第6章Java语言的图形用户界面开发技术作业习题与答案

1、第6章Java语言的图形用户界面开发技术作业习题与答案一、简答题略二、填空题1. 版面管理器2. 图形用户界面3. 标签4. mouseReleased5. CheckboxGroup6. 适配器类7 事件类8.事件机制 事件源三、选择题第1至10题：B D C C A四、编程题1.import java.awt.*;public class ChaSixProg1 exte nds FrameChoice ch;Checkbox bg,fg;Button btn OK,bt nCan cel;Panel p,p1,p2;public ChaSixProg1()super("颜色选择

2、窗口 "); p=new Pan el();p.setLayout (new GridLayout(2,1);p1= new Pan el();p2=new Pan el();p1.setLayout (new FlowLayout();p2.setLayout (new FlowLayout();ch ch ch ch ch ch.add("绿色");=new Choice(); .add("红色"); .add("黄色"); .add("黑色"); .add("紫色");bg=ne

3、w Checkbox("背景");fg=new Checkbox("前景”);pl.add(bg);pl.add(fg);btnOK=new Button(” 确定");btnCancel=new Button("取消");p2.add(b tn OK);p2.add(bt nCa ncel);p.add(p1);p.add(p2);add(ch,BorderLayout. NORTH);add(p,BorderLayout. CENTER);setSize(400,300);public static void main(Strin

4、g args)ChaSixProg1 ChSP= new ChaSixProg1();ChSP.setVisible(true);ChSP.addWi ndowListe ner(new MyWin dowListe ner1();2.import java.awt.*;import java.awt.eve nt.*;public class ChaSixProg2 exte nds Frame impleme nts Actio nListe nerTextField textField1,textField2,textField3;Button button仁new Button(&qu

5、ot;计算");Panel pan el1,pa nel2;public ChaSixProg2()super("计算商品总价");textField仁 new TextField(20);textField2=new TextField(20);textField3=new TextField(20);pan el1= new Pan el();pan el2=new Pan el();pan el1.setLayout (new GridLayout(3,2);pan el2.setLayout (new FlowLayout();panel1.add(new

6、 Label("商品单价:");pa nel1.add(textField1);panel1.add(new Label(" 商品数量 : "); panel1.add(textField2);panel1.add(new Label(" 商品总额 : "); panel1.add(textField3); panel2.add(button1); add(panel1,BorderLayout.CENTER); add(panel2,BorderLayout.SOUTH); button1.addActionListener(thi

7、s); setSize(300,200);setVisible(true);public static void main(String args) ChaSixProg2 Chap1 = new ChaSixProg2(); Chap1.setVisible(true);Chap1.addWindowListener(new MyWindowListener1(); public void actionPerformed(ActionEvent e)int n1,n2,sum; n1=Integer.parseInt(textField1.getText(); n2=Integer.pars

8、eInt(textField2.getText(); sum=n1*n2;textField3.setText(""+sum);3import java.awt.*;import java.awt.event.*;public class ChaSixProg3 extends FrameTextField textField1,textField2;Button button1;public ChaSixProg3()super(" 温度转换窗口 "); textField1=new TextField(30); textField2=new Text

9、Field(30); button1=new Button(" 转换 "); setLayout(new FlowLayout(); add(new Label(" 华氏温度： "); add(textField1);add(new Label(" 摄氏温度： "); add(textField2);textField2.setEditable(false); add(button1);setSize(400,300);pack();button1.addActionListener(new ActionListener() publ

10、ic void actionPerformed(ActionEvent e) button1_actionPerformed(e););addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e)System.exit(0););public static void main(String args) ChaSixProg3 Chasix = new ChaSixProg3(); Chasix.setVisible(true);Chasix.addWindowListener(new MyWindo

11、wListener1();private void button1_actionPerformed(ActionEvent e)double d=Double.parseDouble(textField1.getText();double h=5.0/9.0*(d-32); textField2.setText(""+h);4import java.awt.*;import java.awt.event.*;import java.applet.*;public class TestCardLayout Button first = new Button(" 第一

12、张卡片 "),second = new Button(" 第二张卡片 "),third = new Button(" 第三张卡片 ");Frame TestFrame = new Frame(" 布局管理器 CardLayout");Panel cards = new Panel();Panel p = new Panel();CardLayout cl = new CardLayout();public static void main(String args)TestCardLayout TestCards = new

13、TestCardLayout();TestCards.test();public void test()TestFrame.setLayout(new BorderLayout();p.setLayout(new FlowLayout();p.add(first);p.add(second);p.add(third);TestFrame.add("North", p);cards.setLayout(cl);cards.add("card1",new Panel().add(new Button(" 第一张卡片 "); cards.a

14、dd("card2",new Panel().add(new Button(" 第二张卡片 "); cards.add("card3",new Panel().add(new Button(" 第三张卡片 "); TestFrame.add("Center", cards);TestFrame.setSize(250,200);TestFrame.setVisible(true);TestFrame.addWindowListener(new MyWindowListener1(); first.addActionListener(new ActionListenerOfButton (); second.addActionListener(new ActionListenerOfButton (); third.addActionListener(new ActionListenerOfButton ();class ActionListenerOfBu