Java GUI Calculator Source Code

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In this source code, a Java GUI calculator is created using “swing” and “awt”.
This calculator provides simple arithmetic operations with a simple GUI.
Below is the image of our java gui calculator.
gui_calculator_java
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downloadCode:

package ptunes;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Scanner;
import javax.script.ScriptEngineManager;
import javax.script.ScriptEngine;
import javax.script.ScriptException;

//import java.util.ActionEvent;

public class gui implements ActionListener {

	public gui() {
	
	}
	
	public void actionPerformed (ActionEvent ae ){         

     //   JOptionPane.showMessageDialog(ìHello is pressedî);

  }


	public static void main(String[] args) {
		
		JFrame j = new JFrame("Buttons");
		
		
		Container c = j.getContentPane();
		//c.setLayout(new BorderLayout());
		
		JPanel p1 = new JPanel();
		p1.setLayout(new BorderLayout());
		
		
		 
		p1.setLayout(new GridLayout(4,4,4,4));
		final JTextField t = new JTextField(100);
		Font myFontSize = t.getFont().deriveFont(Font.BOLD,50f);
		t.setFont(myFontSize);
		c.add(t,BorderLayout.NORTH);
		
		final JButton  n1 =  new JButton("1");
		
		n1.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e)
			{
				String num1 = n1.getText();
				String global = t.getText();
				global = global.concat(num1);
				t.setText(global);
				
			}
			
			
		});
		
			
		  final JButton  n2 =  new JButton("2");
		  n2.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n2.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
		  
		  
		  
		  
	       final JButton  n3 =  new JButton("3");
	       n3.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n3.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       final JButton  n4 =  new JButton("4");
	       n4.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n4.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       final JButton  n5 =  new JButton("5");
	       n5.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n5.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       final JButton  n6 =  new JButton("6");
	       n6.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n6.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       
	       final JButton  n7 =  new JButton("7");
	       n7.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n7.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       final JButton  n8 =  new JButton("8");
	       n8.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n8.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       final JButton  n9 =  new JButton("9");
	       n9.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n9.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       final JButton  n10 =  new JButton("0");
	       n10.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n10.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       final JButton  n11 =  new JButton("+");
	       n11.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n11.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       final JButton  n12 =  new JButton("-");
	       n12.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n12.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       
	       final JButton  n13 =  new JButton("*");
	       n13.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n13.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       final  JButton  n14 =  new JButton("/");
	       n14.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					String num1 = n14.getText();
					String global = t.getText();
					global = global.concat(num1);
					t.setText(global);
					
				}
				
				
			});
	       
	       
	       final JButton  n15 =  new JButton("=");
	       n15.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					//String num1 = n15.getText();
					String global = t.getText();
					//global = global.concat(num1);
					
					ScriptEngineManager mgr = new ScriptEngineManager();
				    ScriptEngine engine = mgr.getEngineByName("JavaScript");
				    try {
						String s = engine.eval(global).toString();
						t.setText(s);
						
						
					} catch (ScriptException e1) {
						e1.printStackTrace();
					}
				    
					
				}
				
				
			});
	       
	       
	       
	       final  JButton  n16 =  new JButton("C");
	       n16.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e)
				{
					//String num1 = n16.getText();
					String global = t.getText();
					global = null;
					t.setText(global);
					
				}
				
				
			});
				
		
	       
	       
	       p1.add(n1);
	       p1.add(n2);
	       p1.add(n3);
	       p1.add(n4);
	       p1.add(n5);
	       p1.add(n6);
	       p1.add(n7);
	       p1.add(n8);
	       p1.add(n9);
	       p1.add(n10);
	       p1.add(n11);
	       p1.add(n12);
	       p1.add(n13);
	       p1.add(n14);
	       p1.add(n15);
	       p1.add(n16);
	      
	  
	       
	   c.add(p1,BorderLayout.CENTER);
			
		
		j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	     j.setSize(400,400);
	      j.setVisible(true);        

	
	}

}

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