import java.awt.*; import java.awt.event.*; import javax.swing.*;
public class MyCalculator implements ActionListener { JFrame f; JMenu mEdit; JMenu mView; JMenu mHelp; JMenuItem mCopy; JMenuItem mPaste; JTextField tResult;
JButton bNumber; JButton bOperator; JButton bOther; JButton bM;
boolean isDouble=false;//是否为实数