java swing

package example;
import javax.swing.*;
import java.awt.*;
public class example1 {
	public static void main(String[] args) {
		JFrame win1=new JFrame("第一个窗口");
		JFrame win2=new JFrame("第二个窗口");
		Container con=win1.getContentPane();
		con.setBackground(Color.YELLOW);//通过getcontenpane来给背景换颜色
		win1.setBounds(60,100,188,108);
		win2.setBounds(260,100,188,108);
		win1.setVisible(true);   //使得窗口可见
		win2.setVisible(true);
		win1.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);//设置关闭窗口后的处理：释放当前窗口
		win2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//退出程序
		
	}
}