JFrame窗体练习1

package com;

import javax.swing.JFrame;

public class Framefirst extends JFrame{

    public Framefirst()
	{
		this.setTitle("  hjgj");//设置窗体标题
		
		this.setBounds(300,200,500,500);//设置x轴定位，y轴定位，窗体宽，窗体高
		
		//this.setSize(580,600);//设置窗体宽高
		
		//this.setLocation(300,200);//设置x,y轴定位
		
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置关闭窗体按钮
		
		this.setVisible(true);//设置窗体可见
	}	
    
	public static void main(String[] args) {
			
		new Framefirst();

	}
     
}