Java2实用教程（第二版）程序代码——第十五章 建立窗口和菜单
1
//例子1
2importjava.awt.*;importjava.awt.event.*;
3classMyFrameextendsFrameimplementsItemListener,ActionListener
4
{Checkboxbox;TextAreatext;Buttonbutton;
5
MyFrame(Strings)
6
{super(s);
7box=newCheckbox("设置窗口是否可调整大小");
8text=newTextArea(12,12);
9button=newButton("关闭窗口");
10button.addActionListener(this);
11box.addItemListener(this);
12setBounds(100,100,200,300);
13setVisible(true);
14add(text,BorderLayout.CENTER);
15add(box,BorderLayout.SOUTH);
16add(button,BorderLayout.NORTH);
17setResizable(false);
18validate();
19
}
20publicvoiditemStateChanged(ItemEvente)
21{if(box.getState()==true)
22{setResizable(true);
23}
24else
25{setResizable(false);
26}
27}
28publicvoidactionPerformed(ActionEvente)
29{dispose();
30}
31
}
32classExample15_1
33{publicstaticvoidmain(Stringargs[])
34{newMyFrame("窗口");
35}
36}
37
38//例子2
39importjava.awt.*;importjava.awt.event.*;
40classMyFrameextendsFrameimplementsItemListener,ActionListener
41{Checkboxbox;Buttonbutton;
42Toolkittool;Dimensiondim;
43MyFrame(Strings)
44{super(s);
45box=newCheckbox("设置窗口和屏幕同样大小");
46add(box,BorderLayout.SOUTH);
47button=newButton("关闭窗口");button.addActionListener(this);
48box.addItemListener(this);
49setBounds(100,100,200,300);setVisible(true);
50add(box,BorderLayout.SOUTH);add(button,BorderLayout.NORTH);
51tool=getToolkit();
52validate();
53}
54publicvoiditemStateChanged(ItemEvente)
55{if(box.getState()==true)
56{dim=tool.getScreenSize();
57setBounds(0,0,dim.width,dim.height);
58validate();
59}
60else
61{setBounds(0,0,dim.width,80);
62validate();
63}
64}
65publicvoidactionPerformed(ActionEvente)
66{dispose();
67}
68}
69classExample15_2
70{publicstaticvoidmain(Stringargs[])
71{newMyFrame("窗口");
72}
73}
74
75//例子3
76importjava.awt.*;importjava.awt.event.*;
77class圆extendsPanelimplementsActionListener//负责计算圆面积的类。
78{doubler,area;
79TextField半径=null,
80结果=null;
81Buttonb=null;
82圆()
83{半径=newTextField(10);
84结果=newTextField(10);
85b=newButton("确定");
86add(newLabel("输入半径"));
87add(半径);
88add(newLabel("面积是:"));
89add(结果);add(b);
90b.addActionListener(this);
91}
92publicvoidactionPerformed(ActionEvente)
93{try
94{r=Double.parseDouble(半径.getText());
95area=Math.PI*r*r;
96结果.setText(""+area);
97}
98catch(Exceptionee)
99{半径.setText("请输入数字字符");
100}
101}
102}
103class三角形extendsPanelimplementsActionListener//负责计算三角形面积的类。
104{doublea=0,b=0,c=0,area;
105TextField边_a=newTextField(6),
106边_b=newTextField(6),
107边_c=newTextField(6),
108结果=newTextField(24);
109Buttonbutton=newButton("确定");
110三角形()
111{add(newLabel("输入三边的长度:"));
112add(边_a);add(边_b);add(边_c);
113add(newLabel("面积是:"));
114add(结果);add(button);
115button.addActionListener(this);
116}
117publicvoidactionPerformed(ActionEvente)//获取三边的长度。
118{try{a=Double.parseDouble(边_a.getText());
119b=Double.parseDouble(边_b.getText());
120c=Double.parseDouble(边_c.getText());
121if(a+b>c&&a+c>b&&c+b>a)
122{doublep=(a+b+c)/2;
123area=Math.sqrt(p*(p-a)*(p-b)*(p-c));//计算三角形的面积。
124结果.setText(""+area);
125}
126else
127{结果.setText("您输入的数字不能形成三角形");
128}
129}
130catch(Exceptionee)
131{结果.setText("请输入数字字符");
132}
133}
134}
135classWinextendsFrameimplementsActionListener
136{MenuBarbar=null;Menumenu=null;
137MenuItemitem1,item2;
138圆circle;
139三角形trangle;
140Win()
141{bar=newMenuBar();menu=newMenu("选择");
142item1=newMenuItem("圆面积计算");item2=newMenuItem("三角形面积计算");
143menu.add(item1);menu.add(item2);
144bar.add(menu);
145setMenuBar(bar);
146circle=new圆();
147trangle=new三角形();//创建一个圆和一个三角形。
148item1.addActionListener(this);item2.addActionListener(this);
149setVisible(true);setBounds(100,120,100,90);
150}
151publicvoidactionPerformed(ActionEvente)
152{if(e.getSource()==item1)
153{removeAll();
154add(circle,"Center");//添加圆面积计算的界面。
155validate();
156}
157elseif(e.getSource()==item2)
158{removeAll();
159add(trangle,"Center");//添加三角形面积计算的界面。
160validate();
161}
162}
163}
164publicclassExample15_3
165{publicstaticvoidmain(Stringargs[])
166{Winwin=newWin();win.setBounds(100,100,200,100);win.setVisible(true);
167win.addWindowListener(newWindowAdapter()
168{publicvoidwindowClosing(WindowEvente)
169{System.exit(0);
170}
171});
172}
173}
174
175//例子4
176importjava.awt.*;importjava.awt.event.*;
177classHerwindowextendsFrameimplementsActionListener
178{MenuBarmenubar;Menumenu;MenuItemitem;
179MenuShortcutshortcut=newMenuShortcut(KeyEvent.VK_E);
180Herwindow(Strings)
181{super(s);
182setSize(160,170);setVisible(true);
183menubar=newMenuBar();menu=newMenu("文件");
184item=newMenuItem("退出");
185item.setShortcut(shortcut);//设置菜单选项的键盘快捷键。
186item.addActionListener(this);
187menu.add(item);
188menubar.add(menu);menubar.add(menu);
189setMenuBar(menubar);
190}
191publicvoidactionPerformed(ActionEvente)
192{if(e.getSource()==item)
193{System.exit(0);
194}
195}
196}
197publicclassExample15_4
198{publicstaticvoidmain(Stringargs[])
199{Herwindowwindow=newHerwindow("法制之窗");
200}
201}
202
203//例子5
204importjava.awt.*;importjava.awt.event.*;
205classMyFrameextendsFrameimplementsWindowListener
206{TextAreatext;
207MyFrame(Strings)
208{super(s);
209setBounds(100,100,200,300);
210setVisible(true);
211text=newTextArea();
212add(text,BorderLayout.CENTER);
213addWindowListener(this);
214validate();
215}
216publicvoidwindowActivated(WindowEvente)
217{text.append("\n我被激活");
218validate();
219}
220publicvoidwindowDeactivated(WindowEvente)
221{text.append("\n我不是激活状态了");
222setBounds(0,0,400,400);validate();
223}
224publicvoidwindowClosing(WindowEvente)
225{text.append("\n窗口正在关闭呢");dispose();
226}
227publicvoidwindowClosed(WindowEvente)
228{System.out.println("程序结束运行");
229System.exit(0);
230}
231publicvoidwindowIconified(WindowEvente)
232{text.append("\n我图标化了");
233}
234publicvoidwindowDeiconified(WindowEvente)
235{text.append("\n我撤消图标化");
236setBounds(0,0,400,400);validate();
237}
238publicvoidwindowOpened(WindowEvente){}
239}
240classExample15_5
241{ublicstaticvoidmain(Stringargs[])
242{newMyFrame("窗口");
243}
244}
245
246//例子6
247importjava.awt.*;importjava.awt.event.*;
248classMyFrameextendsFrame
249{TextAreatext;Boypolice;
250MyFrame(Strings)
251{super(s);
252police=newBoy(this);
253setBounds(100,100,200,300);setVisible(true);
254text=newTextArea();add(text,BorderLayout.CENTER);
255addWindowListener(police);validate();
256}
257}
258classBoyextendsWindowAdapter
259{MyFramef;
260publicBoy(MyFramef)
261{this.f=f;
262}
263publicvoidwindowActivated(WindowEvente)
264{f.text.append("\n我被激活");
265}
266publicvoidwindowClosing(WindowEvente)
267{System.exit(0);
268}
269}
270classExample15_6
271{publicstaticvoidmain(Stringargs[])
272{newMyFrame("窗口");
273}
274}
275
276//例子7
277importjava.awt.*;importjava.awt.event.*;
278classMyFrameextendsFrame
279{TextAreatext;
280MyFrame(Strings)
281{super(s);
282setBounds(100,100,200,300);setVisible(true);
283text=newTextArea();add(text,BorderLayout.CENTER);
284addWindowListener(newWindowAdapter()
285{publicvoidwindowActivated(WindowEvente)
286{text.append("\n我被激活");
287}
288publicvoidwindowClosing(WindowEvente)
289{System.exit(0);
290}
291}
292);
293validate();
294}
295}
296classExample15_7
297{publicstaticvoidmain(Stringargs[])
298{newMyFrame("窗口");
299}
300}
301
302//例子8
303importjava.applet.*;importjava.awt.*;importjava.awt.event.*;
304publicclassExample15_8extendsApplet
305{Framef,g;
306publicvoidinit()
307{f=newFrame("音乐之窗");g=newFrame("体育之窗");
308f.setSize(150,150);f.setVisible(true);
309g.setSize(200,200);g.setVisible(false);
310f.addWindowListener(newWindowAdapter()
311{publicvoidwindowClosing(WindowEvente)
312{f.setVisible(false);
313g.setVisible(true);
314}
315});//适配器
316g.addWindowListener(newWindowAdapter()
317{publicvoidwindowClosing(WindowEvente)
318{g.setVisible(false);
319f.setVisible(true);
320}
321});
322}
323}
324
325//例子9
326importjava.awt.*;importjava.awt.event.*;
327publicclassExample15_9
328{publicstaticvoidmain(Stringargs[])
329{MyFramef=newMyFrame();
330f.setBounds(70,70,70,89);f.setVisible(true);f.pack();
331}
332}
333classMyFrameextendsFrameimplementsActionListener
334{PrintJobp=null;//声明一个PrintJob对象。
335Graphicsg=null;
336TextAreatext=newTextArea(10,10);
337Button打印文本框=newButton("打印文本框"),
338打印窗口=newButton("打印窗口"),
339打印按扭=newButton("打印按扭");
340MyFrame()
341{super("在应用程序中打印");
342打印文本框.addActionListener(this);
343打印窗口.addActionListener(this);
344打印按扭.addActionListener(this);
345add(text,"Center");
346Panelpanel=newPanel();
347panel.add(打印文本框);panel.add(打印窗口);panel.add(打印按扭);
348add(panel,"South");
349addWindowListener(newWindowAdapter()
350{publicvoidwindowClosing(WindowEvente)
351{System.exit(0);}
352});
353}
354publicvoidactionPerformed(ActionEvente)
355{if(e.getSource()==打印文本框)
356{p=getToolkit().getPrintJob(this,"ok",null);
357//创建一个PrintJob对象p。
358g=p.getGraphics();//p获取一个用于打印的Graphics对象。
359g.translate(120,200);
360text.printAll(g);
361g.dispose();//释放对象g。
362p.end();
363}
364elseif(e.getSource()==打印窗口)
365{p=getToolkit().getPrintJob(this,"ok",null);
366g=p.getGraphics();//p获取一个用于打印的Graphics对象。
367g.translate(120,200);
368this.printAll(g);//打印当前窗口及其子组件。
369g.dispose();//释放对象g。
370p.end();
371}
372elseif(e.getSource()==打印按扭)
373{p=getToolkit().getPrintJob(this,"ok",null);
374g=p.getGraphics();
375g.translate(120,200);//在打印页的坐标(120,200)处打印第一个"按扭"。
376打印文本框.printAll(g);
377g.translate(78,0);//在打印页的坐标(198,200)处打印第二个"按扭"。
378打印窗口.printAll(g);
379g.translate(66,0);//在打印页的坐标(264,200)处打印第三个"按扭"。
380打印按扭.printAll(g);
381g.dispose();
382p.end();
383}
384}
385}
386
387//例子10
388importjava.awt.*;importjava.awt.event.*;
389importjava.awt.datatransfer.*;
390publicclassExample15_10extendsFrameimplementsActionListener
391{MenuBarmenubar;Menumenu;
392MenuItemcopy,cut,paste;
393TextAreatext1,text2;
394Clipboardclipboard=null;
395Example15_10()
396{clipboard=getToolkit().getSystemClipboard();//获取系统剪贴板。
397menubar=newMenuBar();
398menu=newMenu("Edit");copy=newMenuItem("copy");
399cut=newMenuItem("cut");paste=newMenuItem("paste");
400text1=newTextArea(20,20);text2=newTextArea(20,20);
401copy.addActionListener(this);cut.addActionListener(this);
402paste.addActionListener(this);
403setLayout(newFlowLayout());
404menubar.add(menu);
405menu.add(copy);menu.add(cut);menu.add(paste);
406setMenuBar(menubar);
407add(text1);add(text2);
408setBounds(100,100,200,250);setVisible(true);pack();
409addWindowListener(newWindowAdapter()
410{publicvoidwindowClosing(WindowEvente)
411{System.exit(0);
412}
413});
414}
415publicvoidactionPerformed(ActionEvente)
416{if(e.getSource()==copy)//拷贝到剪贴板。
417{Stringtemp=text1.getSelectedText();//拖动鼠标选取文本。
418StringSelectiontext=newStringSelection(temp);
419clipboard.setContents(text,null);
420}
421elseif(e.getSource()==cut)//剪贴到剪贴板。
422{Stringtemp=text1.getSelectedText();//拖动鼠标选取文本。
423StringSelectiontext=newStringSelection(temp);
424clipboard.setContents(text,null);
425intstart=text1.getSelectionStart();
426intend=text1.getSelectionEnd();
427text1.replaceRange("",start,end);//从Text1中删除被选取的文本。
428}
429elseif(e.getSource()==paste)//从剪贴板粘贴数据。
430{Transferablecontents=clipboard.getContents(this);
431DataFlavorflavor=DataFlavor.stringFlavor;
432if(contents.isDataFlavorSupported(flavor))
433try{Stringstr;
434str=(String)contents.getTransferData(flavor);
435text2.append(str);
436}
437catch(Exceptionee){}
438}
439}
440publicstaticvoidmain(Stringargs[])
441{Example15_10win=newExample15_10();
442}
443}
444
//例子12
importjava.awt.*;importjava.awt.event.*;3
classMyFrameextendsFrameimplementsItemListener,ActionListener4
{Checkboxbox;TextAreatext;Buttonbutton;5
MyFrame(Strings)6
{super(s);7
box=newCheckbox("设置窗口是否可调整大小");8
text=newTextArea(12,12);9
button=newButton("关闭窗口");10
button.addActionListener(this);11
box.addItemListener(this);12
setBounds(100,100,200,300);13
setVisible(true);14
add(text,BorderLayout.CENTER);15
add(box,BorderLayout.SOUTH);16
add(button,BorderLayout.NORTH);17
setResizable(false);18
validate();19
}20
publicvoiditemStateChanged(ItemEvente)21
{if(box.getState()==true)22
{setResizable(true);23
}24
else25
{setResizable(false);26
}27
}28
publicvoidactionPerformed(ActionEvente)29
{dispose();30
}31
}32
classExample15_133
{publicstaticvoidmain(Stringargs[])34
{newMyFrame("窗口");35
}36
}37
38
//例子239
importjava.awt.*;importjava.awt.event.*;40
classMyFrameextendsFrameimplementsItemListener,ActionListener41
{Checkboxbox;Buttonbutton;42
Toolkittool;Dimensiondim;43
MyFrame(Strings)44
{super(s);45
box=newCheckbox("设置窗口和屏幕同样大小");46
add(box,BorderLayout.SOUTH);47
button=newButton("关闭窗口");button.addActionListener(this);48
box.addItemListener(this);49
setBounds(100,100,200,300);setVisible(true);50
add(box,BorderLayout.SOUTH);add(button,BorderLayout.NORTH);51
tool=getToolkit();52
validate();53
}54
publicvoiditemStateChanged(ItemEvente)55
{if(box.getState()==true)56
{dim=tool.getScreenSize();57
setBounds(0,0,dim.width,dim.height);58
validate();59
}60
else61
{setBounds(0,0,dim.width,80);62
validate();63
}64
}65
publicvoidactionPerformed(ActionEvente)66
{dispose();67
}68
}69
classExample15_270
{publicstaticvoidmain(Stringargs[])71
{newMyFrame("窗口");72
}73
}74
75
//例子376
importjava.awt.*;importjava.awt.event.*;77
class圆extendsPanelimplementsActionListener//负责计算圆面积的类。78
{doubler,area;79
TextField半径=null,80
结果=null;81
Buttonb=null;82
圆()83
{半径=newTextField(10);84
结果=newTextField(10);85
b=newButton("确定");86
add(newLabel("输入半径"));87
add(半径);88
add(newLabel("面积是:"));89
add(结果);add(b);90
b.addActionListener(this);91
}92
publicvoidactionPerformed(ActionEvente)93
{try94
{r=Double.parseDouble(半径.getText());95
area=Math.PI*r*r;96
结果.setText(""+area);97
}98
catch(Exceptionee)99
{半径.setText("请输入数字字符");100
}101
}102
}103
class三角形extendsPanelimplementsActionListener//负责计算三角形面积的类。104
{doublea=0,b=0,c=0,area;105
TextField边_a=newTextField(6),106
边_b=newTextField(6),107
边_c=newTextField(6),108
结果=newTextField(24);109
Buttonbutton=newButton("确定");110
三角形()111
{add(newLabel("输入三边的长度:"));112
add(边_a);add(边_b);add(边_c);113
add(newLabel("面积是:"));114
add(结果);add(button);115
button.addActionListener(this);116
}117
publicvoidactionPerformed(ActionEvente)//获取三边的长度。118
{try{a=Double.parseDouble(边_a.getText());119
b=Double.parseDouble(边_b.getText());120
c=Double.parseDouble(边_c.getText());121
if(a+b>c&&a+c>b&&c+b>a)122
{doublep=(a+b+c)/2;123
area=Math.sqrt(p*(p-a)*(p-b)*(p-c));//计算三角形的面积。124
结果.setText(""+area);125
}126
else127
{结果.setText("您输入的数字不能形成三角形");128
}129
}130
catch(Exceptionee)131
{结果.setText("请输入数字字符");132
}133
}134
}135
classWinextendsFrameimplementsActionListener136
{MenuBarbar=null;Menumenu=null;137
MenuItemitem1,item2;138
圆circle;139
三角形trangle;140
Win()141
{bar=newMenuBar();menu=newMenu("选择");142
item1=newMenuItem("圆面积计算");item2=newMenuItem("三角形面积计算");143
menu.add(item1);menu.add(item2);144
bar.add(menu);145
setMenuBar(bar);146
circle=new圆();147
trangle=new三角形();//创建一个圆和一个三角形。148
item1.addActionListener(this);item2.addActionListener(this);149
setVisible(true);setBounds(100,120,100,90);150
}151
publicvoidactionPerformed(ActionEvente)152
{if(e.getSource()==item1)153
{removeAll();154
add(circle,"Center");//添加圆面积计算的界面。155
validate();156
}157
elseif(e.getSource()==item2)158
{removeAll();159
add(trangle,"Center");//添加三角形面积计算的界面。160
validate();161
}162
}163
}164
publicclassExample15_3165
{publicstaticvoidmain(Stringargs[])166
{Winwin=newWin();win.setBounds(100,100,200,100);win.setVisible(true);167
win.addWindowListener(newWindowAdapter()168
{publicvoidwindowClosing(WindowEvente)169
{System.exit(0);170
}171
});172
}173
}174
175
//例子4176
importjava.awt.*;importjava.awt.event.*;177
classHerwindowextendsFrameimplementsActionListener178
{MenuBarmenubar;Menumenu;MenuItemitem;179
MenuShortcutshortcut=newMenuShortcut(KeyEvent.VK_E);180
Herwindow(Strings)181
{super(s);182
setSize(160,170);setVisible(true);183
menubar=newMenuBar();menu=newMenu("文件");184
item=newMenuItem("退出");185
item.setShortcut(shortcut);//设置菜单选项的键盘快捷键。186
item.addActionListener(this);187
menu.add(item);188
menubar.add(menu);menubar.add(menu);189
setMenuBar(menubar);190
}191
publicvoidactionPerformed(ActionEvente)192
{if(e.getSource()==item)193
{System.exit(0);194
}195
}196
}197
publicclassExample15_4198
{publicstaticvoidmain(Stringargs[])199
{Herwindowwindow=newHerwindow("法制之窗");200
}201
}202
203
//例子5204
importjava.awt.*;importjava.awt.event.*;205
classMyFrameextendsFrameimplementsWindowListener206
{TextAreatext;207
MyFrame(Strings)208
{super(s);209
setBounds(100,100,200,300);210
setVisible(true);211
text=newTextArea();212
add(text,BorderLayout.CENTER);213
addWindowListener(this);214
validate();215
}216
publicvoidwindowActivated(WindowEvente)217
{text.append("\n我被激活");218
validate();219
}220
publicvoidwindowDeactivated(WindowEvente)221
{text.append("\n我不是激活状态了");222
setBounds(0,0,400,400);validate();223
}224
publicvoidwindowClosing(WindowEvente)225
{text.append("\n窗口正在关闭呢");dispose();226
}227
publicvoidwindowClosed(WindowEvente)228
{System.out.println("程序结束运行");229
System.exit(0);230
}231
publicvoidwindowIconified(WindowEvente)232
{text.append("\n我图标化了");233
}234
publicvoidwindowDeiconified(WindowEvente)235
{text.append("\n我撤消图标化");236
setBounds(0,0,400,400);validate();237
}238
publicvoidwindowOpened(WindowEvente){}239
}240
classExample15_5241
{ublicstaticvoidmain(Stringargs[])242
{newMyFrame("窗口");243
}244
}245
246
//例子6247
importjava.awt.*;importjava.awt.event.*;248
classMyFrameextendsFrame249
{TextAreatext;Boypolice;250
MyFrame(Strings)251
{super(s);252
police=newBoy(this);253
setBounds(100,100,200,300);setVisible(true);254
text=newTextArea();add(text,BorderLayout.CENTER);255
addWindowListener(police);validate();256
}257
}258
classBoyextendsWindowAdapter259
{MyFramef;260
publicBoy(MyFramef)261
{this.f=f;262
}263
publicvoidwindowActivated(WindowEvente)264
{f.text.append("\n我被激活");265
}266
publicvoidwindowClosing(WindowEvente)267
{System.exit(0);268
}269
}270
classExample15_6271
{publicstaticvoidmain(Stringargs[])272
{newMyFrame("窗口");273
}274
}275
276
//例子7277
importjava.awt.*;importjava.awt.event.*;278
classMyFrameextendsFrame279
{TextAreatext;280
MyFrame(Strings)281
{super(s);282
setBounds(100,100,200,300);setVisible(true);283
text=newTextArea();add(text,BorderLayout.CENTER);284
addWindowListener(newWindowAdapter()285
{publicvoidwindowActivated(WindowEvente)286
{text.append("\n我被激活");287
}288
publicvoidwindowClosing(WindowEvente)289
{System.exit(0);290
}291
}292
);293
validate();294
}295
}296
classExample15_7297
{publicstaticvoidmain(Stringargs[])298
{newMyFrame("窗口");299
}300
}301
302
//例子8303
importjava.applet.*;importjava.awt.*;importjava.awt.event.*;304
publicclassExample15_8extendsApplet305
{Framef,g;306
publicvoidinit()307
{f=newFrame("音乐之窗");g=newFrame("体育之窗");308
f.setSize(150,150);f.setVisible(true);309
g.setSize(200,200);g.setVisible(false);310
f.addWindowListener(newWindowAdapter()311
{publicvoidwindowClosing(WindowEvente)312
{f.setVisible(false);313
g.setVisible(true);314
}315
});//适配器316
g.addWindowListener(newWindowAdapter()317
{publicvoidwindowClosing(WindowEvente)318
{g.setVisible(false);319
f.setVisible(true);320
}321
});322
}323
}324
325
//例子9326
importjava.awt.*;importjava.awt.event.*;327
publicclassExample15_9328
{publicstaticvoidmain(Stringargs[])329
{MyFramef=newMyFrame();330
f.setBounds(70,70,70,89);f.setVisible(true);f.pack();331
}332
}333
classMyFrameextendsFrameimplementsActionListener334
{PrintJobp=null;//声明一个PrintJob对象。335
Graphicsg=null;336
TextAreatext=newTextArea(10,10);337
Button打印文本框=newButton("打印文本框"),338
打印窗口=newButton("打印窗口"),339
打印按扭=newButton("打印按扭");340
MyFrame()341
{super("在应用程序中打印");342
打印文本框.addActionListener(this);343
打印窗口.addActionListener(this);344
打印按扭.addActionListener(this);345
add(text,"Center");346
Panelpanel=newPanel();347
panel.add(打印文本框);panel.add(打印窗口);panel.add(打印按扭);348
add(panel,"South");349
addWindowListener(newWindowAdapter()350
{publicvoidwindowClosing(WindowEvente)351
{System.exit(0);}352
});353
}354
publicvoidactionPerformed(ActionEvente)355
{if(e.getSource()==打印文本框)356
{p=getToolkit().getPrintJob(this,"ok",null);357
//创建一个PrintJob对象p。358
g=p.getGraphics();//p获取一个用于打印的Graphics对象。359
g.translate(120,200);360
text.printAll(g);361
g.dispose();//释放对象g。362
p.end();363
}364
elseif(e.getSource()==打印窗口)365
{p=getToolkit().getPrintJob(this,"ok",null);366
g=p.getGraphics();//p获取一个用于打印的Graphics对象。367
g.translate(120,200);368
this.printAll(g);//打印当前窗口及其子组件。369
g.dispose();//释放对象g。370
p.end();371
}372
elseif(e.getSource()==打印按扭)373
{p=getToolkit().getPrintJob(this,"ok",null);374
g=p.getGraphics();375
g.translate(120,200);//在打印页的坐标(120,200)处打印第一个"按扭"。376
打印文本框.printAll(g);377
g.translate(78,0);//在打印页的坐标(198,200)处打印第二个"按扭"。378
打印窗口.printAll(g);379
g.translate(66,0);//在打印页的坐标(264,200)处打印第三个"按扭"。380
打印按扭.printAll(g);381
g.dispose();382
p.end();383
}384
}385
}386
387
//例子10388
importjava.awt.*;importjava.awt.event.*;389
importjava.awt.datatransfer.*;390
publicclassExample15_10extendsFrameimplementsActionListener391
{MenuBarmenubar;Menumenu;392
MenuItemcopy,cut,paste;393
TextAreatext1,text2;394
Clipboardclipboard=null;395
Example15_10()396
{clipboard=getToolkit().getSystemClipboard();//获取系统剪贴板。397
menubar=newMenuBar();398
menu=newMenu("Edit");copy=newMenuItem("copy");399
cut=newMenuItem("cut");paste=newMenuItem("paste");400
text1=newTextArea(20,20);text2=newTextArea(20,20);401
copy.addActionListener(this);cut.addActionListener(this);402
paste.addActionListener(this);403
setLayout(newFlowLayout());404
menubar.add(menu);405
menu.add(copy);menu.add(cut);menu.add(paste);406
setMenuBar(menubar);407
add(text1);add(text2);408
setBounds(100,100,200,250);setVisible(true);pack();409
addWindowListener(newWindowAdapter()410
{publicvoidwindowClosing(WindowEvente)411
{System.exit(0);412
}413
});414
}415
publicvoidactionPerformed(ActionEvente)416
{if(e.getSource()==copy)//拷贝到剪贴板。417
{Stringtemp=text1.getSelectedText();//拖动鼠标选取文本。418
StringSelectiontext=newStringSelection(temp);419
clipboard.setContents(text,null);420
}421
elseif(e.getSource()==cut)//剪贴到剪贴板。422
{Stringtemp=text1.getSelectedText();//拖动鼠标选取文本。423
StringSelectiontext=newStringSelection(temp);424
clipboard.setContents(text,null);425
intstart=text1.getSelectionStart();426
intend=text1.getSelectionEnd();427
text1.replaceRange("",start,end);//从Text1中删除被选取的文本。428
}429
elseif(e.getSource()==paste)//从剪贴板粘贴数据。430
{Transferablecontents=clipboard.getContents(this);431
DataFlavorflavor=DataFlavor.stringFlavor;432
if(contents.isDataFlavorSupported(flavor))433
try{Stringstr;434
str=(String)contents.getTransferData(flavor);435
text2.append(str);436
}437
catch(Exceptionee){}438
}439
}440
publicstaticvoidmain(Stringargs[])441
{Example15_10win=newExample15_10();442
}443
}444
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