java任意窗口布局

package login;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Toolkit;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

public class Login extends JFrame{

/**

* @param args

* 登陆窗口

*/

private JLabel userId_label;

private JLabel userPass_label;

private JTextField userId_field;

private JTextField userPass_field;

private JButton ok_button;

private JButton cancle_button;

private JPanel mainPanel;

JFrame frame;

int frame_width;//窗口的宽度

int frame_height;//窗口的高度

public Login(){

Toolkit toolKit = Toolkit.getDefaultToolkit();

Dimension dimension = toolKit.getScreenSize();

int width =dimension.width; //屏幕的宽度

int height =dimension.height;//屏幕的宽度

frame_width = width/3;

frame_height = height/3;

buildPanel(frame_width,frame_height);//新建面板

this.setTitle("酒店管理系统");

this.setSize(frame_width,frame_height);

this.setLocation(frame_width, frame_height);

this.setContentPane(mainPanel);

this.setResizable(false);

this.setVisible(true);

}

public void buildPanel(int frame_width,int frame_height){

mainPanel = new JPanel();

mainPanel.setSize(frame_width, frame_height);

mainPanel.setLayout(null);

//新建帐号、密码标签

userId_label = new JLabel("帐号:");

userId_label.setSize(100, 20);

userId_label.setLocation(frame_width/4, frame_height/4);

userPass_label = new JLabel("密码:");

userPass_label.setSize(100, 20);

userPass_label.setLocation(frame_width/4, frame_height/4+40);

//新建帐号、密码文本域

userId_field = new JTextField();

userId_field.setSize(150, 20);

userId_field.setLocation(frame_width/4+50, frame_height/4);

userId_field.setBackground(Color.WHITE);

userPass_field = new JTextField();

userPass_field.setSize(150, 20);

userPass_field.setLocation(frame_width/4+50, frame_height/4+40);

//新建确定、取消按钮

ok_button = new JButton("确定");

ok_button.setSize(70, 20);

ok_button.setLocation(frame_width/4+10, frame_height/4+80);

cancle_button = new JButton("取消");

cancle_button.setSize(70, 20);

cancle_button.setLocation(frame_width/4+120, frame_height/4+80);

mainPanel.add(userId_label);

mainPanel.add(userPass_label);

mainPanel.add(userId_field);

mainPanel.add(userPass_field);

mainPanel.add(ok_button);

mainPanel.add(cancle_button);

}