JAVA简单计算器.docx

package counter;import java.awt.Button;import java.awt.Container;import java.awt.GridLayout;import java.awt.Panel;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JTextField;public class Calculator_JF private int gao = Toolkit.getDefaultToolkit().getScreenSize().height;private int kuan = Toolkit.getDefaultToolkit().getScreenSize().width;private static Panel p ;private static JTextField txtnum;private static JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0;private static JButton equal, ac ,point,sroot,plus,minus,asterisk,slash;private static String sign;private static double pro,pro2;private static int pointnum = 0;private static int srootnum = 0;private static int equalnum = 0;public Calculator_JF()/GridLayout grid = new GridLayout(4,4);JFrame jf = new JFrame(计算器);Container c = jf.getContentPane();c.setLayout(null);jf.setBounds(kuan/4, gao/4, kuan/4, gao/3 + 20);jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);jf.setVisible(true);p = new Panel();b1 = new JButton(1);b2 = new JButton(2);b3 = new JButton(3);b4 = new JButton(4);b5 = new JButton(5);b6 = new JButton(6);b7 = new JButton(7);b8 = new JButton(8);b9 = new JButton(9);b0 = new JButton(0);point = new JButton(.);equal = new JButton(=);ac = new JButton(AC);sroot = new JButton(+/-);plus = new JButton(+);minus = new JButton(-);asterisk = new JButton(*);slash = new JButton(/);p.add(b1);p.add(b2);p.add(b3);p.add(plus);p.add(b4);p.add(b5);p.add(b6);p.add(minus);p.add(b7);p.add(b8);p.add(b9);p.add(asterisk);p.add(b0);p.add(point);p.add(equal);p.add(slash);p.add(sroot); p.add(ac);p.setBounds(20, 70, 220, 220);txtnum = new JTextField();txtnum.setBounds(40, 10, 180, 50);c.add(p);c.add(txtnum);public void run()b1.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+1);elsetxtnum.setText();txtnum.setText(txtnum.getText()+1);equalnum = 0;);b2.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+2);elsetxtnum.setText();txtnum.setText(txtnum.getText()+2);equalnum = 0;);b3.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+3);elsetxtnum.setText();txtnum.setText(txtnum.getText()+3);equalnum = 0;);b4.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+4);elsetxtnum.setText();txtnum.setText(txtnum.getText()+4);equalnum = 0;);b5.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+5);elsetxtnum.setText();txtnum.setText(txtnum.getText()+5);equalnum = 0;);b6.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+6);elsetxtnum.setText();txtnum.setText(txtnum.getText()+6);equalnum = 0;);b7.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+7);elsetxtnum.setText();txtnum.setText(txtnum.getText()+7);equalnum = 0;);b8.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+8);elsetxtnum.setText();txtnum.setText(txtnum.getText()+8);equalnum = 0;);b9.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+9);elsetxtnum.setText();txtnum.setText(txtnum.getText()+9);equalnum = 0;);b0.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(equalnum = 0)txtnum.setText(txtnum.getText()+0);elsetxtnum.setText();txtnum.setText(txtnum.getText()+0);equalnum = 0;);point.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) pointnum = txtnum.getText().indexOf(.);System.out.println(pointnum);if(pointnum = -1)txtnum.setText(txtnum.getText()+.);elseJOptionPane.showMessageDialog(null, 不可有两个“. , 警告！ ,JOptionPane.ERROR_MESSAGE););equal.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) pro2 = Double.parseDouble(txtnum.getText();if(sign = +)pro2 = pro2+pro;txtnum.setText(Double.toString(pro2);equalnum+;else if (sign = -)pro2 = pro-pro2;txtnum.setText(Double.toString(pro2);equalnum+;else if (sign = *)pro2 = pro2*pro;txtnum.setText(Double.toString(pro2);equalnum+;else if (sign = /)pro2 = pro / pro2;txtnum.setText(Double.toString(pro2);equalnum+;);sroot.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) srootnum = txtnum.getText().indexOf(-);if(srootnum = -1)txtnum.setText(- + txtnum.getText();elsetxtnum.setText(txtnum.getText().substring(1, txtnum.getText().length(););plus.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) pro = Double.parseDouble(txtnum.getText();txtnum.setText();sign = +;);minus.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) pro = Double.parseDouble(txtnum.getText();txtnum.setText();sign = -;);asterisk.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) pro = Double.parseDouble(txtnum.getText();txtnum.setText();sign = *;);slash.addActionListener(new ActionListener()public void actionPerf