JAVA编写的基础计算器源代码.docVIP

实验题目 计算器 设计过程 代码 计算器frame类 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package counter; import java.awt.*; import javax.swing.*; /** * * @author Administrator */ public class CounterFrameClass extends JFrame{ public CounterFrameClass() { this.setTitle(Counter); Container contentPane=getContentPane(); CounterPanelClass panel=new CounterPanelClass(); contentPane.add(panel); this.setSize(300,300); this.setVisible(true); this.setResizable(false); } } 计算器panel类 /* * To change this template, choose Tools | Templates * and open the template in the editor. */ package counter; import java.awt.*; import java.awt.event.*; import javax.swing.*; /** * * @author Administrator */ public class CounterPanelClass extends JPanel{ private JLabel display; private JPanel panel; private double result; private String lastCommand; private boolean start; public CounterPanelClass() { setLayout(new BorderLayout()); this.result = 0; this.lastCommand = =; this.start = true; this.display = new JLabel(0,SwingConstants.RIGHT); this.display.setForeground(Color.red); this.display.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createLineBorder(Color.yellow), BorderFactory.createEmptyBorder(5, 5, 5, 5))); add(display,BorderLayout.NORTH); ActionListener insert=new InsertAction(); ActionListener command=new CommandAction(); panel=new JPanel(); panel.setLayout(new GridLayout(4,4)); addButton(7,insert); addButton(8,insert); addButton(9,insert); addButton(/,command); addButton(4,insert); addButton(5,insert); addButton(6,insert); addButton(*,command); addButton(1,insert); addButton(2,insert); addButton(3,insert);