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Program of Making a simple calculator using java swing

import javax.swing.*; import java.awt.event.*; class Calc implements ActionListener {     JFrame f;     JTextField t;     JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdiv,bmul,bsub,badd,bdec,beq,bdel,bclr;     static double a=0,b=0,result=0;     static int operator=0;     Calc()     {         f=new JFrame("Calculator");         t=new JTextField();         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");         b...