java语言程序设计(第三版)书本代码

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1、书本代码:输出C语言教程。classa{publicstaticvoidmain(String[]args){SetBookbookl=newSetBook();bookl.setname("C语言教程");System.out.println(bookl.getname());}}classSetBook{privateStringname="java语言教程";privateStringauthor;publicvoidsetname(StringinName){name=inName;publicStrin

2、ggetname(){returnname;2、显示I■AppDe>o□回区1显示importjava.awt.*;importjavax.swing.*;importjava.awt.event.*;importjava.applet.*;publicclassAppDemoextendsAppletimplementsActionListener{JButtonbutton;JTextFieldfield;publicstaticvoidmain(String[]args){JFramewindow=newJ

3、Frame(uAppDemoM);window.setBounds(200,200,500,400);AppDemoapp=newAppDemo();window.add("Center’’，app);app.init();window.setVisible(true);window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}publicvoidinit(){button=newJButton("显示");button.addActionListener(th

4、is);field=newJTextField(23);add(field);add(button);}Application的合并运publicvoidactionPerformed(ActionEvente){field.setText(HApplet行n);}3、温度classW1{publicstaticvoidmain(StringargslJ){intc=28;switch(c<10?l:c<25?2:c<35?3:4){case1:System.out.println(•’"+c+"摄氏度有点冷")

5、;break;case2:System.out.println("n+c+"摄氏度正合适n);break;case3:System.out.printlnfn+c+n摄氏度有点热n);break;default:System.out.printlnf’n+c+"摄氏度太热了•’);break;}}}温度(无退出)classCl{publicstaticvoidmain(Stringargs[]){doubled1=23.4;doubled2=35.1;if(d2〉=dl){System.out.println(d

6、l);System.out.println(d2);}else{Sy$tem.out.println(d2);System.out.println(d1);))}4、计算器importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassCalStringstrl=n”；//运算数1Stringstr2=,,H;//运算数2Stringfh=,,u;//运算符Stringjg=^;//结果doubledjg=O;intkey_dian=0

7、;//输入小数点后为11r,没输入为零，避免重复输入小数点。intkey_n2=l;//是"r给strl赋值。。是’给str2赋值JFrameframe=newJFrameC’作业…计算器n);JTextFieldjg_TextField=newJTextField(20);JButtonbutton_clear=newJButton(’’淸除’’)；JButtonbuttonO=newJButton(H0H);JButtonbuttonl=newJButton("1’’)；JButtonbutton2=newJ

8、Button(u2n);JButtonbutton3=newJButton(”3’’)；JButtonbutton4=newJButton("4n);JButtonbutton5=newJButton(”5");JButtonbutton6=newJButton("6’’)；JButtonbutton7=newJButton(H7n);JButtonbutton8=new