java 简易计算器如何清除 java编写简易计算器界面

import javax.swing.*;
public class Demo {

	/**
	 * 计算器界面
	 * @author M4ndy
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		JFrame f = new JFrame("计算器");
		f.setLayout(null);
		
		JTextField t = new JTextField();
		t.setBounds(20, 5, 250, 40);
		f.add(t);
		
		int x = 20;
		int y = 55;
		String[] str = {"7","8","9","+","4","5","6","-","1","2","3","*","0","C","=","."};
		for(int i = 0;i<str.length;i++)
		{
			JButton btn = new JButton();
			btn.setText(str[i]);
			btn.setBounds(x, y, 60, 40);
			if(x<215)
			{
				x+=65;
			}
			else
			{
				x = 20;
				y+=45;
			}
			f.add(btn);
		}
		f.setBounds(500,200,300,300);
		f.setVisible(true);

	}

}

以上是全部代码，没有实现计算功能，仅仅是计算器界面，运行结果如下图所示：

代码也相对来说比较简单，后期会实现计算功能，并考虑给大家剖析代码，欢迎大家留言交流，有疑惑的地方一起解决！