java实训记录之一

       使用Java GUI包编写图形用户界面。

     

package com.you.gui;


import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToolBar;

public class GTest1 extends JFrame {
	private static final long serialVersionUID = 1L;
	
	private JCheckBox jb1 = new JCheckBox("音乐",true);//复选框
	private JCheckBox jb2 = new JCheckBox("美术");
	private JCheckBox jb3 = new JCheckBox("体育");
	
	private JRadioButton jr1 = new JRadioButton("语文");//单选框
	private JRadioButton jr2 = new JRadioButton("数学");
	private JRadioButton jr3 = new JRadioButton("英语");
	
	private Student[] stu = new Student[] {
			new Student("张三", 18),
			new Student("李四", 28),
			new Student("王五", 38)
	};
	
	private JComboBox jcb = new JComboBox(stu);//下拉列表
	private JList jl = new JList(stu);
	
	private JTextArea jta = new JTextArea(10, 10);//滚动条
	
	private JToolBar jtb = new JToolBar(JToolBar.HORIZONTAL);//工具栏
	private JButton b1 = new JButton(new ImageIcon(GTest1.class.getResource("/res/b1.png")));
	private JButton b2 = new JButton(new ImageIcon(GTest1.class.getResource("/res/b2.png")));
	private JButton b3 = new JButton(new ImageIcon(GTest1.class.getResource("/res/b3.png")));
	
	private JMenuBar jb = new JMenuBar();//菜单栏
	private JMenu jm1 = new JMenu("File");
	private JMenu jm2 = new JMenu("Edit");
	private JMenu jm3 = new JMenu("Source");
	private JMenuItem jt1 = new JMenuItem("Open");//菜单中的实现项
	private JMenuItem jt2 = new JMenuItem("Save");
	private JMenuItem jt3 = new JMenuItem("Quit");
	
	
	
	private JPanel jp = new JPanel();
	
	public GTest1() {
		this.setSize(500, 550);
		this.setLocation(100, 100);
		
		jp.add(jb1);
		jp.add(jb2);
		jp.add(jb3);
		
		jp.add(jr1);
		jp.add(jr2);
		jp.add(jr3);
		
		jp.add(jcb);
		jp.add(jl);
		
		jp.add(new JScrollPane(jta));
		
		jtb.add(b1);
		jtb.add(b2);
		jtb.add(b3);
		jtb.setFloatable(false);
		this.add(jtb,"North");
		
		this.add(jp);
		
		jm1.add(jt1);
		jm1.add(jt2);
		jm1.add(jt3);
		jb.add(jm1);
		jb.add(jm2);
		jb.add(jm3);
		this.setJMenuBar(jb);
		
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
	}
	
	public static void main(String[] args) {
		new GTest1();
	}

}

class Student {
	private String name;
	private int age;
	
	public Student(String name, int age) {
		this.name = name;
		this.age = age;
	}
	
	@Override
	public String toString() {
		return name;
	}
}

运行结果：

table代码为：

package com.you.gui;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;

public class GTable extends JFrame {
	
	Object[][] studs = new Object[][]  {
			{1, new Student("张三",18),"男"},
			{2, new Student("李四",28),"女"},
			{3, new Student("王五",38),"男"}
	};
	
	Object[] title = new Object[] {
			"id", "name", "sex"
	};
	
	public GTable() {
		super("表格示例");
		this.setSize(300, 350);
		this.setLocation(100, 100);
		
		this.add(new JScrollPane(new JTable(studs, title)));
		
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	
	public static void main(String[] args) {
		new GTable();
	}

}

运行结果为：

一个简单的登录窗口的实现：

package com.you.gui;

import java.awt.Button;
import java.awt.Dimension;
import java.awt.Toolkit;

import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Login extends JFrame{
	private static final long serialVersionUID = 1L;
	
	private Box container = Box.createVerticalBox();
	private Box b1 = Box.createHorizontalBox();
	private Box b2 = Box.createHorizontalBox();
	private Box b3 = Box.createHorizontalBox();
	
	private JLabel luser = new JLabel("用户名：");
	private JLabel lpwd = new JLabel("密    码：");
	private JTextField user = new JTextField(10);
	private JPasswordField pwd = new JPasswordField(10);
	
	private Button ok = new Button("登录");
	private Button cancel = new Button("注册");
	
	
	public Login() {
		super("用户登录");
		this.setSize(350, 300);

		Toolkit tool = this.getToolkit();
		this.setIconImage(tool.createImage(this.getClass().getResource("/res/1.jpg")));
		Dimension dtool = tool.getScreenSize();
		this.setLocation((dtool.width-350)/2, (dtool.height-300)/2-100);
		
		
		b1.add(Box.createHorizontalStrut(50));
		b1.add(luser);
		b1.add(Box.createHorizontalStrut(10));
		b1.add(user);
		b1.add(Box.createHorizontalStrut(50));
		
		b2.add(Box.createHorizontalStrut(50));
		b2.add(lpwd);
		b2.add(Box.createHorizontalStrut(10));
		b2.add(pwd);
		b2.add(Box.createHorizontalStrut(50));
		
		b3.add(Box.createHorizontalStrut(80));
		b3.add(ok);
		b3.add(Box.createHorizontalStrut(10));
		b3.add(cancel);
		b3.add(Box.createHorizontalStrut(80));
		
		container.add(Box.createVerticalStrut(80));
		container.add(b1);
		container.add(Box.createVerticalStrut(10));
		container.add(b2);
		container.add(Box.createVerticalStrut(10));
		container.add(b3);
		container.add(Box.createVerticalStrut(80));
		this.add(container);
		
		this.setVisible(true);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
	}
	
	public static void main(String[] args) {
		new Login();
	}
	

}