package A;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.*;
public class Calcular3 extends JFrame implements ActionListener,MouseListener{
private int m1=0,n=0;//
private double m2=0;//运算的数
private int flag=0;
JFrame f;
JPanel p1,p2,p3;
JTextField t;
JButton b1[]=new JButton[18];
String b[]= {"1","2","3","4","5","6","7","8","9","0","清空","退格",".","=","+","-","*","/"};
public Calcular3(){
f=new JFrame("计算器");
t=new JTextField(35);
p1=new JPanel();
p2=new JPanel();
p3=new JPanel();
f.setBounds(100, 100, 400, 200);
f.add(p1,BorderLayout.NORTH);
f.add(p2,BorderLayout.CENTER);
f.add(p3,BorderLayout.EAST);
p2.setLayout(new GridLayout(5,3));
p3.setLayout(new GridLayout(4,1));
p1.add(t);
for(int i=0;i<14;i++) {
b1[i]=new JButton(b[i]);
p2.add(b1[i]);
b1[i].addActionListener(this);
}
for(int i=14;i<18;i++) {
b1[i]=new JButton(b[i]);
p3.add(b1[i]);
b1[i].addActionListener(this);
}
/*for(int i=0;i<18;i++) {
b1[i].addActionListener(this);
}*/
f.setVisible (to true);
}
// implemented method interface
public void the mouseClicked (the MouseEvent E) {
}
public void the mousePressed (the MouseEvent E) {
}
public void the mouseReleased (the MouseEvent E) {
}
public void the mouseEntered (the MouseEvent E) {
}
void the mouseExited public (the MouseEvent E) {
}
public void the actionPerformed (the ActionEvent E) {
String STR = "";
int I;
for (I = 0; I <=. 9; I ++) {
IF (e.getSource () == B1 [I]) {
IF (I ==. 9) {
n * n = 10;
} the else {
n = n * 10 + I +. 1;
}
STR = String.valueOf (n); n // shaped into a string STR
t.setText (STR); // displayed on the text box
}
}
M1 = the Integer.parseInt (t.getText ());
for(i=14;i<18;i++) {//+、-、*、/
if(e.getSource()==b1[i]) {//匹配运算符
the Integer.parseInt = M1 (t.getText ());
IF (In Flag == 15) {
M2 = M1 + M2;
} the else IF (In Flag == 16) {
M2 = M1-M2;
} the else IF (In Flag == . 17) {
M2 = M1 * M2;
} the else IF (in Flag == 18 is) {
M2 = M1 / M2;
} the else M2 = M1; // operator absence of continuous operation, to save the current data M2
IF (I = 14 =) In Flag = 15;
the else IF (I == 15) In Flag = 16;
the else IF (I == 16) In Flag =. 17;
the else In Flag = 18 is;
STR String.valueOf = (B [I]);
T. setText (str); // displayed on the text block
n = 0; // restore the next recording data
break; // matching data is found to exit the loop
}
}
IF (e.getSource () == B1 [13 is]) { = //
M2 = M1 + M2;
} the else IF (In Flag == 16) {
IF (In Flag == 15) {
M2 = M1-M2;
} the else IF (In Flag ==. 17) {
M2 = M1 * M2;
} the else IF (In Flag == 18 is) {
M2 = M2 / M1;
} the else M2 = M1;
STR = String.valueOf (M2);
t.setText (STR); // displayed on the text block
n = 0; // restore next data record
flag = 0; // flag reduction 0, indicates that there are no processing operators
}
IF (e.getSource () == B1 [10]) {// the variables are cleared to 0
M1 = 0;
M2 = 0;
in Flag = 0;
n-= 0;
t.setText ( "0 "); // displayed on the text box
}
IF (e.getSource () == B1 [. 11]) {// backspace
m1 = (int) (Double.parseDouble ( t.getText ()) / 10);
M1 = n-;
STR = String.valueOf (M1);
t.setText (STR);
}
IF (e.getSource () == B1 [12 is]) {// decimal
the Integer.parseInt = M1 (t.getText ());
= String.valueOf STR (M1 + B [12 is]);
t.setText (STR); // displayed on the text box
int J = 0;
for (I = 0; I <=. 9; I ++) {
IF (E .getSource () == B1 [I]) {
J ++;
M2 = Math.pow (0.1, J) * the Integer.parseInt (B [I]);
STR String.valueOf = (M1 + M2);
t.setText ( STR); // displayed on the text box
}
}
}
}
// main function
public static void main (String [] args) {
new new Calcular3 ();
}
}