newapplet.java

用netbean的applet形式编写的计算器

/*
 * NewApplet.java
 *
 * Created on 2008年11月2日, 上午9:42
 */

package javaapplication9;

/**
 *
 * @author  Administrator
 */
public class NewApplet extends java.applet.Applet {

    /** Initializes the applet NewApplet */
    public void init() {
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    initComponents();
                }
            });
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    /*自定义变量*/
    
    private String firstSign="=";//保存+,-,*,/,=命令
    private double result=0;//保存计算结果
    private double lastResult=0; //保存前一运算结果
    private boolean numStart=false;//判断是否为数字的开始
    private boolean point=false;//判断是否按下小数点键
    private boolean pi=false;//判断是否按下PI键
    private boolean smP=false;//判断是否按下"说明"键
    private int i=0;
    private String signCopy=firstSign;
    private double xCopy=0;
    
    /** This method is called from within the init() method to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();
        jButton4 = new javax.swing.JButton();
        jButton5 = new javax.swing.JButton();
        jButton6 = new javax.swing.JButton();
        jButton7 = new javax.swing.JButton();
        jButton8 = new javax.swing.JButton();
        jButton9 = new javax.swing.JButton();
        jButton10 = new javax.swing.JButton();
        jButton11 = new javax.swing.JButton();
        jButton12 = new javax.swing.JButton();
        jButton13 = new javax.swing.JButton();
        jButton14 = new javax.swing.JButton();
        jButton15 = new javax.swing.JButton();
        jButton16 = new javax.swing.JButton();
        jButton17 = new javax.swing.JButton();
        jButton18 = new javax.swing.JButton();
        jButton19 = new javax.swing.JButton();
        jButton20 = new javax.swing.JButton();
        jButton21 = new javax.swing.JButton();
        jButton22 = new javax.swing.JButton();
        jButton23 = new javax.swing.JButton();
        jButton24 = new javax.swing.JButton();
        jButton25 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jButton26 = new javax.swing.JButton();
        jButton27 = new javax.swing.JButton();
        jButton28 = new javax.swing.JButton();

        setBackground(new java.awt.Color(204, 255, 255));
        setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        jTextField1.setBackground(new java.awt.Color(204, 255, 204));
        jTextField1.setEditable(false);
        jTextField1.setForeground(new java.awt.Color(0, 0, 255));
        jTextField1.setText("0");
        add(jTextField1, new org.netbeans.lib.awtextra.AbsoluteConstraints(30, 30, 260, 30));

        jButton1.setText("1");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 170, 90, -1));

        jButton2.setText("2");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });
        add(jButton2, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 170, 70, -1));

        jButton3.setText("3");
        jButton3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton3ActionPerformed(evt);
            }
        });
        add(jButton3, new org.netbeans.lib.awtextra.AbsoluteConstraints(180, 170, 60, -1));

        jButton4.setText("4");
        jButton4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton4ActionPerformed(evt);
            }
        });
        add(jButton4, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 140, 90, -1));

        jButton5.setText("5");
        jButton5.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton5ActionPerformed(evt);
            }
        });
        add(jButton5, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 140, 70, -1));

        jButton6.setText("6");
        jButton6.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton6ActionPerformed(evt);
            }
        });
        add(jButton6, new org.netbeans.lib.awtextra.AbsoluteConstraints(180, 140, 60, -1));

        jButton7.setText("7");
        jButton7.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton7ActionPerformed(evt);
            }
        });
        add(jButton7, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 110, 90, -1));

        jButton8.setText("8");
        jButton8.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton8ActionPerformed(evt);
            }
        });
        add(jButton8, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 110, 70, -1));

        jButton9.setText("9");
        jButton9.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton9ActionPerformed(evt);
            }
        });
        add(jButton9, new org.netbeans.lib.awtextra.AbsoluteConstraints(180, 110, 60, -1));

        jButton10.setText("0");
        jButton10.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton10ActionPerformed(evt);
            }
        });
        add(jButton10, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 200, 90, -1));

        jButton11.setText("+/-");
        jButton11.setActionCommand("jButton11");
        jButton11.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton11ActionPerformed(evt);
            }
        });
        add(jButton11, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 200, 70, -1));

        jButton12.setText(".");
        jButton12.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton12ActionPerformed(evt);
            }
        });
        add(jButton12, new org.netbeans.lib.awtextra.AbsoluteConstraints(180, 200, 60, -1));

        jButton13.setText("+");
        jButton13.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton13ActionPerformed(evt);
            }
        });
        add(jButton13, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 110, 60, -1));

        jButton14.setText("-");
        jButton14.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton14ActionPerformed(evt);
            }
        });
        add(jButton14, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 140, 60, -1));

        jButton15.setText("x");
        jButton15.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton15ActionPerformed(evt);
            }
        });
        add(jButton15, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 170, 60, -1));

        jButton16.setText("÷");
        jButton16.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton16ActionPerformed(evt);
            }
        });
        add(jButton16, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 200, 60, -1));

        jButton17.setText("开方");
        jButton17.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton17ActionPerformed(evt);
            }
        });
        add(jButton17, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 230, 90, -1));

        jButton18.setText("立方");
        jButton18.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton18ActionPerformed(evt);
            }
        });
        add(jButton18, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 260, 70, -1));

        jButton19.setText("平方");
        jButton19.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton19ActionPerformed(evt);
            }
        });
        add(jButton19, new org.netbeans.lib.awtextra.AbsoluteConstraints(110, 230, 70, -1));

        jButton20.setText("1/x");
        jButton20.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton20ActionPerformed(evt);
            }
        });
        add(jButton20, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 230, 60, -1));

        jButton21.setText("=");
        jButton21.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton21ActionPerformed(evt);
            }
        });
        add(jButton21, new org.netbeans.lib.awtextra.AbsoluteConstraints(240, 260, 60, -1));