设计一个计算器用户界面_course

设计一个计算器用户界面—— 不知道怎么布局，改了很多遍都不成功 图一是标准的，图二是我的结果，下面是我打的代码: import java.awt.*; import javax.swing.*; public class Calculator extends JFrame{ public Calculator() { JPanel p1 = new JPanel(); //frame.setLayout(new FlowLayout()); p1.setLayout(new GridLayout(4,1)); p1.add(new JButton("MC")); p1.add(new JButton("MR")); p1.add(new JButton("MS")); p1.add(new JButton("M+")); JPanel p2 = new JPanel(); p2.setLayout(new GridLayout(4,3)); for(int i = 1; i <= 9; i++){ p2.add(new JButton("" + i + " ")); } p2.add(new JButton("0")); p2.add(new JButton("+/-")); p2.add(new JButton("-")); JPanel p3 = new JPanel(); p3.setLayout(new GridLayout(4,2)); p3.add(new JButton("/")); p3.add(new JButton("sqrt")); p3.add(new JButton("*")); p3.add(new JButton("%")); p3.add(new JButton("-")); p3.add(new JButton("1/x")); p3.add(new JButton("+")); p3.add(new JButton("=")); JPanel p4 = new JPanel(new BorderLayout()); p4.setLayout(new GridLayout(1,4)); p4.add(new JLabel(" ")); p4.add(new JButton("Backspace")); p4.add(new JButton("CE")); p4.add(new JButton("C")); JPanel p5 = new JPanel(new BorderLayout()); p5.add(new JTextField(" "),BorderLayout.NORTH); add(p5,BorderLayout.EAST); p5.add(p1,BorderLayout.WEST); p5.add(p2,BorderLayout.CENTER); p5.add(p3,BorderLayout.EAST); p5.add(p4,BorderLayout.NORTH); } public static void main(String[] args) { Calculator frame = new Calculator(); frame.setTitle("标准计算器"); frame.setSize(500, 400); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } }  

java初学者，老师要求做计算器。页面做好了，就是不知道怎么实现按钮的功能_course

import java.awt.BorderLayout; import java.awt.Container; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.border.EmptyBorder; public class JSQ extends JFrame{ private static final long serialVersionUID = -8568126884560298943L; public JSQ(){ Container C=getContentPane(); result.setEnabled(false); result.setHorizontalAlignment(JTextField.RIGHT); result.setColumns(12); Font f=new Font("宋体",Font.BOLD,36); result.setFont(f); JButton clear=new JButton("CE"); JButton point=new JButton("."); JButton count=new JButton("="); JButton add=new JButton("+"); JButton sub=new JButton("—"); JButton mul=new JButton("*"); JButton div=new JButton("/"); JButton back=new JButton("C"); JButton electric=new JButton("ON/OFF"); JButton music=new JButton("music"); JButton[] button=new JButton[10]; for(int i=0;i<=9;i++){ button[i]=new JButton(""+i); } JPanel p=new JPanel(); p.setLayout(new BorderLayout(0,0)); p.add(result,BorderLayout.NORTH); p.setBorder(new EmptyBorder(5,5,5,5)); JPanel p1=new JPanel(); p1.setSize(210,250); p1.setLayout(new GridLayout(4,5,5,5)); for(int i=9;i>=0;i--){ p1.add(button[i]); } p1.add(point); p1.add(back); p1.setBorder(new EmptyBorder(5,0,0,0)); JPanel p2=new JPanel(); p2.setLayout(new GridLayout(4,2,5,5)); p2.setBorder(new EmptyBorder(5,0,0,0)); p2.add(music); p2.add(electric); p2.add(clear); p2.add(add); p2.add(sub); p2.add(mul); p2.add(div); p2.add(count); JPanel p3=new JPanel(); p3.setLayout(new GridLayout(1,2,5,5)); p3.add(p1); p3.add(p2); p.add(p3,BorderLayout.CENTER); C.add(p); } public static void main(String[] args) { JSQ J=new JSQ(); J.setTitle("计算器"); J.setSize(420,300); J.setLocationRelativeTo(null); J.setDefaultCloseOperation(EXIT_ON_CLOSE); J.setVisible(true); } }

布局一个计算器界面_course

280*400，顶部是输入框!下面就是小键盘啦，做不出这布局啊，求解求解