JAVA PROGRAM: TO CALCULATE CIRCUMFERENCE OF A CIRCLE

CODING OF CALCULATE CIRCUMFERENCE BUTTON(jButton1)

        double cm,r;
        r=Double.parseDouble(jTextField1.getText());
        cm=2*3.14*r;
        jTextField2.setText(" "+cm);

CODING OF CLEAR BUTTON(jButton2)

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

CODING OF EXIT BUTTON(jButton3)   

        System.exit(0);

CODING

RUNNING

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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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JAVA PROGRAM: TO CALCULATE ARITHMETIC MEAN OF THREE NUMBERS

CODING OF ARITHMETIC MEAN BUTTON(jButton1)
        float num1,num2,num3,am;
        num1=Float.parseFloat(jTextField1.getText());
        num2=Float.parseFloat(jTextField2.getText());
        num3=Float.parseFloat(jTextField3.getText());
        am=(num1+num2+num3)/3;
        jTextField4.setText(" "+am);


CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
        jTextField4.setText(" ");
   

CODING OF EXIT BUTTON(jButton3)   
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO CALCULATE SIMPLE INTEREST USING FUNCTION

This is an example of function with parameters but without return value in java programming.

CODING OF SIMPLE INTEREST BUTTON(jButton1)
        float p,r,t,si;
        p=Float.parseFloat(jTextField1.getText());
        r=Float.parseFloat(jTextField2.getText());
        t=Float.parseFloat(jTextField3.getText());
        si(p,r,t);


CODING OF FUNCTION si()
        void si(float a,float b,float c)
        {
             float s=(a*b*c)/100;
             jTextField4.setText(" "+s);
        }


CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
        jTextField4.setText(" ");


CODING OF EXIT BUTTON(jButton3)
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO CALCULATE FACTORIAL OF A NUMBER

CODING OF FACTORIAL BUTTON(jButton1)
        int num,i,fac = 1;
        num=Integer.parseInt(jTextField1.getText());
        for(i=num;i>0;i--)
        {
         fac=fac*i;
        }
        jTextField2.setText(" "+fac);

CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
   

CODING OF EXIT BUTTON(jButton3)   
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO FIND SUM OF DIGITS OF A NUMBER

CODING OF ACTION BUTTON(jButton1)
        int num,temp,sum = 0;
        num=Integer.parseInt(jTextField1.getText());
            while(num>0)
            {
                temp=num%10;
                sum+=temp;
                num=num/10;
            }
            jTextField2.setText(" "+sum);


CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
   

CODING OF EXIT BUTTON(jButton3)   
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO REVERSE A NUMBER

HEADER FILE
        import javax.swing.JOptionPane;


CODING OF REVERSE BUTTON(jButton1)
        int num,temp,rev = 0;
        num=Integer.parseInt(jTextField1.getText());
        if(num<10)
        {
         JOptionPane.showMessageDialog(null,"Enter a number greater than 9");
         jTextField1.setText("");
        }
        else
        {
         while(num>0)
         {
          temp=num%10;
          rev=temp+10*rev;
          num=num/10;
         }
         jTextField2.setText(" "+rev);
        }

CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
   

CODING OF EXIT BUTTON(jButton3)
        System.exit(0);

CODING

RUNNING

RUNNING

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JAVA PROGRAM: TO MULTIPLY TWO NUMBERS WITHOUT USING ARITHMETIC OPERATOR *

CODING OF MULTIPLY BUTTON(jButton1)
        int num1,num2,i,mul=0;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        for(i=1;i<=num2;i++)
         mul+=num1;
        jTextField3.setText(" "+mul);

CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");


CODING OF EXIT BUTTON(jButton3)
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO PRINT TEXT IN TEXTAREA

CODING OF ACTION BUTTON(jButton1)
        String name,address,clas;
        int rollno;
        name=jTextField1.getText();
        clas=jTextField2.getText();
        rollno=Integer.parseInt(jTextField3.getText());
        address=jTextField4.getText();
        jTextArea1.append("Information entered by you:\n\nName:   "+name+"\nClass: "+clas+"\nRoll no. "+rollno+"\nAddress: "+address);

CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText("");
        jTextField2.setText("");
        jTextField3.setText("");
        jTextField4.setText("");
        jTextArea1.setText("");

CODING OF EXIT BUTTON(jButton3)
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO CALCULATE SIMPLE INTEREST

 

CODING OF SIMPLE INTEREST BUTTON(jButton1)
        float p,r,t,si;
        p=Float.parseFloat(jTextField1.getText());
        r=Float.parseFloat(jTextField2.getText());
        t=Float.parseFloat(jTextField3.getText());
        si=(p*r*t)/100;
        jTextField4.setText(" "+si);


CODING OF CLEAR BUTTON(jButton2)
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
        jTextField4.setText(" ");


CODING OF EXIT BUTTON(jButton3)
        System.exit(0);

CODING

RUNNING

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JAVA PROGRAM: TO ADD, SUBTRACT, MULTIPLY, DIVIDE TWO NUMBERS

CODING OF ADD BUTTON(jButton1)
    {
        int num1,num2,sum;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        sum=num1+num2;
        jTextField3.setText(" "+sum);
    }

CODING OF SUBTRACT BUTTON(jButton2)
    {
        int num1,num2,sub;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        sub=num1-num2;
        jTextField3.setText(" "+sub);
    }

CODING OF MULTIPLY BUTTON(jButton3)
    {
        int num1,num2,mul;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        mul=num1*num2;
        jTextField3.setText(" "+mul);
    }

CODING OF DIVIDE BUTTON(jButton4)
    {
        int num1,num2;
        float div;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        div=(float)num1/num2;
        jTextField3.setText(" "+div);
    }

CODING OF CLEAR BUTTON(jButton5)
    {
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
    }

CODING OF EXIT BUTTON(jButton6)
    {
        System.exit(0);
    }

CODING

RUNNING

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JAVA PROGRAM: TO DIVIDE TWO NUMBERS

CODING OF DIVIDE BUTTON(jButton1)
    {
        int num1,num2;
        float div;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        div=(float)num1/num2;
        jTextField3.setText(" "+div);
    }

CODING OF CLEAR BUTTON(jButton2)
    {
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
    }

CODING OF EXIT BUTTON(jButton3)
    {
        System.exit(0);
    }

CODING

RUNNING

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JAVA PROGRAM: TO MULTIPLY TWO NUMBERS

 

 CODING OF SUBTRACT BUTTON(jButton1)
    {
        int num1,num2,mul;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        mul=num1*num2;
        jTextField3.setText(" "+mul);
    }

CODING OF CLEAR BUTTON(jButton2)
    {
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
    }

CODING OF EXIT BUTTON(jButton3)
    {
        System.exit(0);
    }

CODING

RUNNING

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JAVA PROGRAM: TO SUBTRACT TWO NUMBERS

 

 CODING OF SUBTRACT BUTTON(jButton1)
    {
        int num1,num2,sub;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        sub=num1-num2;
        jTextField3.setText(" "+sub);
    }

CODING OF CLEAR BUTTON(jButton2)
    {
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
    }

CODING OF EXIT BUTTON(jButton3)
    {
        System.exit(0);
    }

CODING

RUNNING

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JAVA PROGRAM: TO ADD TWO NUMBERS

 
CODING OF ADD BUTTON(jButton1)
   {
        int num1,num2,sum;
        num1=Integer.parseInt(jTextField1.getText());
        num2=Integer.parseInt(jTextField2.getText());
        sum=num1+num2;
        jTextField3.setText(" "+sum);
   }

CODING OF CLEAR BUTTON(jButton2)
   {
        jTextField1.setText(" ");
        jTextField2.setText(" ");
        jTextField3.setText(" ");
   }

CODING OF EXIT BUTTON(jButton3)
   { 
        System.exit(0);
   }

CODING

RUNNING

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