Example15_1.java JFrame常用方法
import javax.swing.*;
import static javax.swing.JFrame.*;
public class Example15_1 {
public static void main(String args[]) {
JFrame window1=new JFrame("撤销窗口");
JFrame window2=new JFrame("退出程序");
window1.setBounds(60,100,188,108);
window2.setBounds(260,100,188,108);
window1.setVisible(true);
window1.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
window2.setVisible(true);
window2.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
}
Example 15_2.java菜单条、菜单、菜单项
public class Example15_2 {
public static void main(String args[]) {
WindowMenu win=new WindowMenu("带菜单的窗口",20,30,200,190);
}
}
import javax.swing.*;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import static javax.swing.JFrame.*;
public class WindowMenu extends JFrame{
JMenuBar menubar ;
JMenu menu,subMenu;
JMenuItem item1,item2;
public WindowMenu() {}
public WindowMenu(String s,int x,int y,int w,int h) {
init(s);
setLocation(x,y);
setSize(w,h);
setVisible (true);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
void init(String s) {
setTitle(s);
menubar =new JMenuBar();
menu=new JMenu("菜单");
subMenu=new JMenu("软件项目");
item1=new JMenuItem("JAVA话题",new ImageIcon("D:\\java\\eclipse\\5.24作业\\src\\a.gif"));//图片所在位置
item2=new JMenuItem("动画话题",new ImageIcon("D:\\java\\eclipse\\5.24作业\\src\\b.gif"));//图片所在位置
item1.setAccelerator(KeyStroke.getKeyStroke('A'));
item2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
menu.add(item1);
menu.addSeparator();
menu.add(item2);
menu.add(subMenu);
subMenu.add(new JMenuItem("汽车销售系统",new ImageIcon("D:\\java\\eclipse\\5.24作业\\src\\c.gif")));
subMenu.add(new JMenuItem("农场信息系统",new ImageIcon("D:\\java\\eclipse\\5.24作业\\src\\d.gif")));
menubar.add(menu);
setJMenuBar(menubar);
}
}
Example15_3 常用组件
public class Example15_3 {
public static void main (String args[]) {
ComponentInWindow win =new ComponentInWindow();
win.setBounds(100,100,310,260);
win.setTitle("常用组件");
}
}
import java.awt.*;
import javax.swing.*;
import static javax.swing.JFrame.*;
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 JLabel("文本框"));
text=new JTextField(10);
add(text);
add(new JLabel("按钮:"));
button =new JButton("确定");
add(button);
add(new JLabel("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 JLabel("单选按钮:"));
group=new ButtonGroup();
radio1=new JRadioButton("男");
radio2=new JRadioButton("女");
group.add(radio1);
group.add(radio2);
add(radio1);
add(radio2);
add(new JLabel("下拉列表:"));
comBox=new JComboBox();
comBox.addItem("音乐天地");
comBox.addItem("武术天地");
comBox.addItem("象棋乐园");
add(comBox);
add(new JLabel("文本区:"));
area=new JTextArea(6,12);
add(new JScrollPane(area));
}
}
Example15_4常用布局
public class Example15_4{
public static void main(String args[])
{
WindowBoxLayout win=new WindowBoxLayout () ;
win. setBounds (100, 100, 310,260);
win. setTitle("嵌套盒式布局容器");
}
}
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.createVerticalStrut(10));
baseBox.add(boxV2) ;
add (baseBox) ;
}
}
Example15_6 ActionEvent事件
public class Example15_6 {
public static void main(String args[]) {
WindowActionEvent win=new WindowActionEvent();
win.setBounds(100, 100, 460,360);
win. setTitle ("处理ActionEvent事件");
}
}
import java.awt. *;
import javax.swing.*;
public class WindowActionEvent extends JFrame{
JTextField inputText;
JTextArea textShow;
JButton button;
PoliceListen listener;
public WindowActionEvent() {
init() ;
setVisible(true) ;
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
}
void init() {
setLayout (new FlowLayout()) ;
inputText = new JTextField(10);
button = new JButton("读取");
textShow = new JTextArea(9, 30) ;
listener= new PoliceListen();
listener.setJTextField(inputText);
listener.setJTextArea (textShow) ;
inputText.addActionListener (listener);
add (inputText) ;
add (button) ;
add (new JScrollPane (textShow)) ;
}
}
import java.awt.event.*;
import java.io.*;
import javax. swing.*;
public class PoliceListen implements ActionListener{
JTextField textInput;
JTextArea textShow;
public void setJTextField (JTextField text) {
textInput = text;
}
public void setJTextArea (JTextArea area) {
textShow = area;
}
public void actionPerformed (ActionEvent e) {
textShow.setText (null);
try { File file = new File (textInput.getText());
FileReader inOne = new FileReader (file) ;
BufferedReader inTwo = new BufferedReader (inOne) ;String s=null;
while((s=inTwo. readLine()) !=null)
textShow.append(s+"n") ;
inOne.close();
inTwo.close();
}
catch (Exception ee) {
textShow. append (ee.toString());
}
}
}
注意:如果出现无法解析的情况,可将错误代码重新键盘输入。