classdao.java

实用的java习题,初学者可用

package classone.com;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.FlowLayout;
import javax.swing.JTextField;
import java.awt.*;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class ClassDAO extends JFrame {
    JPanel contentPane;
    JTextField txtcount = new JTextField();
    JMenuBar jMenuBar1 = new JMenuBar();
    JMenu jMenu1 = new JMenu();
    JMenuItem jMenuItem1 = new JMenuItem();
    JMenuItem jMenuItem2 = new JMenuItem();
    JMenu jMenu2 = new JMenu();
    JButton btn7 = new JButton();
    JButton btn8 = new JButton();
    JButton btn9 = new JButton();
    JButton btnexpect = new JButton();
    JButton btn4 = new JButton();
    JButton btn5 = new JButton();
    JButton btn6 = new JButton();
    JButton btnride = new JButton();
    JButton btn1 = new JButton();
    JButton btn2 = new JButton();
    JButton btn3 = new JButton();
    JButton btnminus = new JButton();
    JButton btn0 = new JButton();
    JButton btnc = new JButton();
    JButton btnplus = new JButton();
    JButton btnup_to = new JButton();
    public ClassDAO() {
        try {
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    /**
     * Component initialization.
     *
     * @throws java.lang.Exception
     */
    private void jbInit() throws Exception {
        contentPane = (JPanel) getContentPane();
        contentPane.setLayout(null);
        this.setJMenuBar(jMenuBar1);
        setSize(new Dimension(400, 330));
        setTitle("计算器");
        txtcount.setText("");
        txtcount.setBounds(new Rectangle(62, 29, 265, 34));
        jMenu1.setText("编辑(E)");
        jMenuItem1.setText("复制(C) Ctri+C");
        jMenuItem2.setText("粘贴(P) Ctri+v");
        jMenu2.setText("帮助");
        btn7.setBounds(new Rectangle(65, 78, 52, 33));
        btn7.setText("7");
        btn7.addActionListener(new ClassDAO_jButton1_actionAdapter(this));
        btn8.setBounds(new Rectangle(133, 78, 52, 33));
        btn8.setText("8");
        btn8.addActionListener(new ClassDAO_btn8_actionAdapter(this));
        btn9.setBounds(new Rectangle(200, 78, 52, 34));
        btn9.setText("9");
        btn9.addActionListener(new ClassDAO_btn9_actionAdapter(this));
        btnexpect.setBounds(new Rectangle(270, 78, 52, 33));
        btnexpect.setText("/");
        btnexpect.addActionListener(new ClassDAO_btnexpect_actionAdapter(this));
        btn4.setBounds(new Rectangle(64, 123, 52, 33));
        btn4.setText("4");
        btn4.addActionListener(new ClassDAO_btn4_actionAdapter(this));
        btn5.setBounds(new Rectangle(133, 123, 52, 33));
        btn5.setText("5");
        btn5.addActionListener(new ClassDAO_btn5_actionAdapter(this));
        btn6.setBounds(new Rectangle(200, 123, 52, 33));
        btn6.setText("6");
        btn6.addActionListener(new ClassDAO_btn6_actionAdapter(this));
        btnride.setBounds(new Rectangle(270, 123, 52, 33));
        btnride.setText("*");
        btnride.addActionListener(new ClassDAO_btnride_actionAdapter(this));
        btn1.setBounds(new Rectangle(66, 173, 52, 33));
        btn1.setText("1");
        btn1.addActionListener(new ClassDAO_btn1_actionAdapter(this));
        btn2.setBounds(new Rectangle(133, 173, 52, 33));
        btn2.setText("2");
        btn2.addActionListener(new ClassDAO_btn2_actionAdapter(this));
        btn3.setBounds(new Rectangle(200, 173, 52, 33));
        btn3.setText("3");
        btn3.addActionListener(new ClassDAO_jButton11_actionAdapter(this));
        btnminus.setBounds(new Rectangle(270, 173, 52, 33));
        btnminus.setText("-");
        btnminus.addActionListener(new ClassDAO_btnminus_actionAdapter(this));
        btn0.setBounds(new Rectangle(65, 223, 52, 33));
        btn0.setText("0");
        btn0.addActionListener(new ClassDAO_btn0_actionAdapter(this));
        btnc.setBounds(new Rectangle(133, 223, 52, 33));
        btnc.setText("c");
        btnplus.setBounds(new Rectangle(270, 223, 52, 33));
        btnplus.setText("+");
        btnplus.addActionListener(new ClassDAO_btnplus_actionAdapter(this));
        btnup_to.setBounds(new Rectangle(200, 223, 52, 33));
        btnup_to.setText("=");
        btnup_to.addActionListener(new ClassDAO_btnup_to_actionAdapter(this));
        txtcount.addActionListener(new ClassDAO_txtcount_actionAdapter(this));
        btnc.addActionListener(new ClassDAO_btnc_actionAdapter(this));
        jMenuBar1.add(jMenu1);
        jMenuBar1.add(jMenu2);
        jMenu1.add(jMenuItem1);
        jMenu1.add(jMenuItem2);
        contentPane.add(txtcount);
        contentPane.add(btnexpect);
        contentPane.add(btn7);
        contentPane.add(btn9);
        contentPane.add(btn4);
        contentPane.add(btn6);
        contentPane.add(btnride);
        contentPane.add(btn1);
        contentPane.add(btnminus);
        contentPane.add(btn0);
        contentPane.add(btnplus);
        contentPane.add(btn3);
        contentPane.add(btnup_to);
        contentPane.add(btn2);
        contentPane.add(btnc);
        contentPane.add(btn5);
        contentPane.add(btn8);
    }

    boolean flag = false;
    String op1;
    String op2;
    double count;
    String action;
    public void jButton1_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn7.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn7.getActionCommand());
        }

    }

    public void jButton11_actionPerformed(ActionEvent e) {

    }

    public void txtcount_actionPerformed(ActionEvent e) {

    }

    public void btn8_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn8.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn8.getActionCommand());
        }

    }

    public void btn9_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn9.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn9.getActionCommand());
        }

    }

    public void btn4_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn4.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn4.getActionCommand());
        }

    }

    public void btn5_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn5.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn5.getActionCommand());
        }

    }

    public void btn6_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn6.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn6.getActionCommand());
        }

    }

    public void btn1_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn1.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn1.getActionCommand());
        }

    }

    public void btn2_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn2.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn2.getActionCommand());
        }

    }

    public void btn3_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn3.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn3.getActionCommand());
        }

    }

    public void btn0_actionPerformed(ActionEvent e) {
        if (flag) {
            txtcount.setText(btn0.getActionCommand());
            flag = false;
        } else {
            txtcount.setText(txtcount.getText() + btn0.getActionCommand());
        }

    }

    public void btnplus_actionPerformed(ActionEvent e) {
       op1 = txtcount.getText();
        String action = "plus";
        flag = true;
    }