JAVA PROGRAM: TO CALCULATE AREA OF CIRCLE

CODING OF CALCULATE AREA BUTTON(jButton1)

        double area,r;
        r=Double.parseDouble(jTextField1.getText());
        area=3.14*r*r;
        jTextField2.setText(" "+area);

CODING OF CLEAR BUTTON(jButton2)

        jTextField1.setText(" ");
        jTextField2.setText(" ");
   

CODING OF EXIT BUTTON(jButton3)   

        System.exit(0);

Java Program Coding

Java Program Running

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