计算器界面java设计

import java.awt.*; import javax.swing.*; public class jisuanqi { public static void main(String args[]) { JFrame app=new JFrame("计算器"); app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel p=new JPanel(); JTextField t=new JTextField("0",10); t.setHorizontalAlignment(JTextField.RIGH