java程序补全

/**

* Created by Administrator on 2015/6/20.

*/

class PersonA {

private String name

public void setName(String newName) {

name = newName

}

public String getName() {

return name

}

} //缺了 花括号

class StudentA extends PersonA //_____________________//【代码1】继承personA类

{

private String department

public void setDepartment(String newDepartment) {

department = newDepartment

}

public String getDepartment() {

return department

}

}

public class C1 {

public static void main(String[] args) {

StudentA s1 = new StudentA()

// ____________________________//【代码2】调用setName方法传入参数“张三”

s1.setName("张三")

//________________________________//【代码3】调用setDepartment

s1.setDepartment("信管系")

//方法传入参数“信管系”

//________________________________//【代码4】显示s1的姓名

System.out.println(s1.getName())

//________________________________//【代码5】显示s1的系别

System.out.println(s1.getDepartment())

}

}

public class CheckBoxWindow extends JFrame implements  ItemListener {

JCheckBox box// 多选按钮

JLabel imageLabel

CheckBoxWindow() {

box = new JCheckBox("显示图像")

imageLabel = new JLabel(new ImageIcon("1.jpg"))

imageLabel.setVisible(false)

add(box, BorderLayout.NORTH)

add(imageLabel, BorderLayout.CENTER)

validate()

box.addItemListener(this)// 为box增加监听器

setBounds(120, 120, 260, 270)

setVisible(true)

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)

}

public void itemStateChanged(ItemEvent e) {

JCheckBox box = (JCheckBox) e.getItemSelectable()

if (box.isSelected()) // 如果多选按钮被选中

imageLabel.setVisible(true)

else imageLabel.setVisible(false)

}

}

1 ItemListener

2 this

3 box.isSelected()

public void add(int a,int b){

    System.out.println(a+"+"+b+"="+(a+b))

}

public void show(){

    System.out.println("show方法执行了！")

}

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