java2实用教程(例子代码)第4版第九章

java2实用教程(例子代码)第4版第九章例9_3

Lt4_3.java

public clss Lt4_3

{

public static void main(String args[])

{

ComponentInWindor win = new ComponentInWindor();

win.setBounds(100,100,310,260);

win.setTitle("常用组件");

}

}

ComponentInWindow.java

import?java.awt.*;

import javax.swing.*;

public class ComponentInWindow extends JFrame

{

JTextField text;

JButton button;

JCheckBox checkBox1，checkBox2，checkBox3；

JRadiobutton radio1,radio2;

ButtonGroup group;

JComboBox comBox;

JTextArea area;

public ComponentInWindow()

{

init();

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

void init()

{

setLayout(new FlowLayout())；

add(new JLable("文本框："))；

text = new JTextField(10);

add(text);

add(new JLable("按钮："));

button = new JButton("确定");

add(button);

add(new JLable("选择框："));

checkBox1 = new JCheckBox("喜欢音乐")；

checkBox2 = new JCheckBox("喜欢旅游")；

checkBox3 = new JCheckBox("喜欢篮球")；

add(checkBox1);

add(checkBox2);

add(checkBox3);

add(new JLable("单选按钮："));

group = new ButtonGroup();

radio1 = new JRadioButton("男")；

radio2 = new JRadioButton("女")；

group.add(radio1);

group.add(radio1);

add(radio1);

add(radio2);

add(new JLable("下拉列表："));

comBox = new JComboBox();

comBox.additem("音乐天地");

comBox.additem("武术天地");

comBox.additem("象棋天地");

add(comBox);

area = new JTextArea("文本区")；

add(new JScrollPane(area));

}

}

例9_3

Lt9_4.java

import javax.swing.*;

import?java.awt.*;

public class Lt9_4

{

public static void main(String args[])

{

new WinGrid();

}

}

class WinGrid extends JFrame

{

GridLayout grid;

JPanel chessboard;

WinGrid()

{

chessboard = new JPanel();

grid=new GridLayout(12,12);

chessboard.setLayout(grid0;

Label label[][] =new Label();

for(int i=0;i<12;i++)

{

for(int j=0;j<12;j++)

{

label[i][j]=new Label();

if((i+j)%2)

label[i][j].setBackground(Color.black);

else

label[i][j].setBackground(Color.white);

chessboard.add(label[i][j]);

}

}

add(chessboard,BorderLayout.CENTER);

add(new JButton("北方参战者"),BorderLayout.NORTH);

add(new JButton("南方参战者"),BorderLayout.SOUTH);

add(new JButton("西方观察团"),BorderLayout.WEST);

add(new JButton("东方观察团"),BorderLayout.EAST);

setBounds(10,10,570,390);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

validate();

}

}

WindowBoxLayout.java

import javax.swing.*;

public class WindowBoxLayout extends JFrame

{

Box baseBox ,boxV1,boxV2;

public WindowBoxLayout()

{

setLayout(new java.awt.FlowLayout());

init();

setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }

void init();

{

boxV1=Box.createVerticalBox();

boxV1.add(new JLabel("姓名"));

boxV1.add(Box.createVerticalStrut(8));

boxV1.add(new JLabel("email"));

boxV1.add(Box.createVerticalStrut(8));

boxV1.add(new JLabel("职业"));

boxV2=Box.createVerticalBox();

boxV2.add(new JTextField(10));

boxV2.add(Box.createVerticalStrut(8));

boxV2.add(new JTextField(10));

boxV2.add(Box.createVerticalStrut(8));

boxV2.add(new JTextField(10));

baseBox=Box.createHorizontalBox();

baseBox.add(boxV1);

baseBox.add(Box.createHorizontalStrut(10));

baseBox.add(boxV2);

add(baseBox);

}

}