Calculator Project

import java.awt.*;
import javax.swing.border.*;
import java.awt.event.*;

public class calculator extends JFrame {


private JTextField text = new JTextField(10);
private float data1=0;
private float data2=0;
private JButton btn0 = new JButton("0");
private JButton btn1 = new JButton("1");
private JButton btn2 = new JButton("2");
private JButton btn3 = new JButton("3");
private JButton btn4 = new JButton("4");
private JButton btn5 = new JButton("5");
private JButton btn6 = new JButton("6");
private JButton btn7 = new JButton("7");
private JButton btn8 = new JButton("8");
private JButton btn9 = new JButton("9");
private JButton dot = new JButton(".");
private JButton equal = new JButton("=");
private JButton minus = new JButton("-");
private JButton plus = new JButton("+");
private JButton multiply = new JButton("*");
private JButton divid = new JButton("/");
private JButton bracket1 = new JButton("(");
private JButton bracket2 = new JButton(")");
private JButton pow = new JButton("^");
private JButton post = new JButton("post");
private JButton norm = new JButton("norm");

public calculator(){
JPanel s = new JPanel();
s.setLayout(new BorderLayout());
s.setSize(300,200);

JPanel p = new JPanel();
p.setLayout(new GridLayout(3,4));
p.setSize(300,200);
p.add(btn0);
p.add(btn1);
p.add(btn2);
p.add(btn3);
p.add(btn4);
p.add(btn5);
p.add(btn6);
p.add(btn7);
p.add(btn8);
p.add(btn9);
p.add(dot);
p.add(equal);


JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(3,3));
p1.setSize(300,200 );
p1.add(post);
p1.add(divid);
p1.add(plus);
p1.add(norm);
p1.add(pow);
p1.add(minus);
p1.add(bracket1);
p1.add(bracket2);
p1.add(multiply);



s.add(p , BorderLayout.WEST);
s.add(p1 , BorderLayout.EAST);
s.add(text , BorderLayout.NORTH);
s.setVisible(true);
getContentPane().add(s);

btn0.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"0");
}
});
btn1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"1");
}
});
btn2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"2");
}
});
btn3.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"3");
}
});
btn4.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"4");
}
});
btn5.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"5");
}
});

btn6.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"6");

}
});
btn7.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"7");

}
});
btn8.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"8");
}
});
btn9.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"9");
}
});
dot.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+".");
}
});


minus.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"-");
}
});
/*
minus.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
data1=Float.parseFloat(text.getText());


}
});
*/

plus.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"+");
}
});


multiply.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"*");

}
});


divid.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"/");

}
});



post.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){

// ماذا اكتب هنا حتى يتم التحويل واظهار الناتج على الشاشة


}
});


bracket1.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+"(");

}
});


bracket2.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
text.setText(text.getText()+")");

}
});

norm.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
// حتى يرجعلي المعادلة الاصلية

}
});

equal.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){

//حتى يظهر الناتج رقمي بعد حساب ال post
}
});

}




public static void main(String[] args) {
calculator c = new calculator();
c.setSize(500,400);
c.setLayout(new FlowLayout());
c.setVisible(true);
c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
c.setTitle("Calculator");
}

}

import javax.swing.*;

private int maxSize;

private char[] stackArray;

private int top;

public Stack(int max) {
maxSize = max;
stackArray = new char[maxSize];
top = -1;
}

public void push(char j) {
stackArray[++top] = j;
}

public char pop() {
return stackArray[top--];
}

public char peek() {
return stackArray[top];
}

public boolean isEmpty() {
return (top == -1);
}
}

class Stack {

private Stack stack;

private String input;

private String output = "";

public InToPost(String in) {
input = in;
int stackSize = input.length();
stack = new Stack(stackSize);
}

public String doTrans(String input) {
for (int j = 0; j < input.length(); j++) {
char ch = input.charAt(j);
switch (ch) {
case '+':
case '-':
gotOper(ch, 1);
break; // (precedence 1)
case '*': // it's * or /
case '/':
gotOper(ch, 2); // go pop operators
break; // (precedence 2)
case '(': // it's a left paren
stack.push(ch); // push it
break;
case ')': // it's a right paren
gotParen(ch); // go pop operators
break;
default: // must be an operand
output = output + ch; // write it to output
break;
}
}
while (stack.isEmpty()) {
output = output + stack.pop();

}
System.out.println(output);
return output; // return postfix
}

public void gotOper(char opThis, int prec1) {
while (!stack.isEmpty()) {
char opTop =stack.pop();
if (opTop == '(') {
stack.push(opTop);
break;
}// it's an operator
else {// precedence of new op
int prec2;
if (opTop == '+' || opTop == '-')
prec2 = 1;
else
prec2 = 2;
if (prec2 < prec1) // if prec of new op less
{ // than prec of old
stack.push(opTop); // save newly-popped op
break;
} else
// prec of new not less
output = output + opTop; // than prec of old
}
}
stack.push(opThis);
}

public void gotParen(char ch){
while (!stack.isEmpty()) {
char chx = stack.pop();
if (chx == '(')
break;
else
output = output + chx;
}
}
}

public class InToPost {