Java Swing 绝对布局管理方法，null布局


		首先把相关容器的布局方式设为 setLayout(null);
然后调用组件的  setBounds() 方法
设置button的位置为(100,100) 长宽分别为 60，25
jButton.setBounds(new Rectangle(100, 100, 60, 25));
 

[java 
import java.awt.Container;  
import java.awt.Dimension;  
import java.awt.Rectangle;  
import java.awt.Toolkit;  
  
import javax.swing.JButton;  
import javax.swing.JCheckBox;  
import javax.swing.JComboBox;  
import javax.swing.JFrame;  
import javax.swing.JPasswordField;  
import javax.swing.JTextField;  
  
public class Log extends JFrame {  
    public static void main(String[] args) {  
        Log log = new Log();  
    }  
    private JButton btLog;  
    private JTextField tfUser;  
    private JPasswordField tfPwd;  
    private JCheckBox pwdKeep;  
    private JComboBox adminType;  
  
    public Log() {  
        super("固定资产管理系统");  
        super.setSize(380, 292);  
        super.setVisible(true);  
        super.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
        centered(this);  
        btLog = new JButton("登     录");  
        btLog.setBounds(new Rectangle(93, 220, 180, 30));//参数分别是坐标x，y，宽，高  
        this.setLayout(null);//设置布局管理器为空  
        this.add(btLog);  
        tfUser = new JTextField();  
        tfUser.setBounds(new Rectangle(73, 115, 220, 25));  
        this.add(tfUser);  
        tfPwd = new JPasswordField();  
        tfPwd.setBounds(new Rectangle(73, 150, 220, 25));  
        this.add(tfPwd);  
        pwdKeep = new JCheckBox("记住密码");  
        pwdKeep.setBounds(new Rectangle(68, 185, 110, 25));  
        this.add(pwdKeep);  
        adminType = new JComboBox(new String[] { "普通职员", "管理员", "高级管理员" });  
        adminType.setBounds(new Rectangle(183, 185, 100, 25));  
        this.add(adminType);  
  
    }  
//布局居中方法  
    public void centered(Container container) {  
        Toolkit toolkit = Toolkit.getDefaultToolkit();  
        Dimension screenSize = toolkit.getScreenSize();  
        int w = container.getWidth();  
        int h = container.getHeight();  
        container.setBounds((screenSize.width - w) / 2,  
                (screenSize.height - h) / 2, w, h);  
    }  
}

补充：软件开发 , Java ,