JAVA CODES

Hello !here are two java codes from my OOP assingments.
1.Converts temparature from Fareinheit scale to celcius scale
2.Calculates the magnitude of a vector


/**A program that converts temparature
 * from degrees fahreinheit
 * to degrees celcius
 */
import javax.swing.JOptionPane;

public class FareinheitToCelsiusGUI
{
    public static void main(String args[])
    {
        float temp_fahrt;
        double temp_cels;
        String x=JOptionPane.showInputDialog(null,"ENTER THE DEGREE IN FAHREINHET","INPUT TEMPARATURE",JOptionPane.INFORMATION_MESSAGE);
        temp_fahrt=Float.parseFloat(x);
     
        temp_cels=(5.0/9.0)*(temp_fahrt-32.0);//formula to convert degrees
     
        JOptionPane.showMessageDialog(null,+temp_cels+" Celcius","TEMPARATURE CONVERSION RESULT",JOptionPane.ERROR_MESSAGE);// the result is displayed here
    }
}


Program 2

import javax.swing.JOptionPane;
public class VextorLenght{
 public static void main(String []args)
 {

 
 
       JOptionPane.showMessageDialog(null,"A VECTOR IS THE FORM\n r=ai+bj+ck\nENTER THE VALUES OF a b and c","INSTRUCTIONS",JOptionPane.INFORMATION_MESSAGE);
        String T=JOptionPane.showInputDialog(null,"ENTER THE VALUE OF a","COEFFICIENT OF COMPONENT i",JOptionPane.INFORMATION_MESSAGE);
       int i=Integer.parseInt(T);
     
        String R=JOptionPane.showInputDialog(null,"ENTER THE VALUE OF b","COEFFICIENT OF COMPONENT j",JOptionPane.INFORMATION_MESSAGE);
       int j=Integer.parseInt(R);
     
        String S=JOptionPane.showInputDialog(null,"ENTER THE VALUE OF c","COEFFICIENT OF COMPONENT k",JOptionPane.INFORMATION_MESSAGE);
      int k=Integer.parseInt(S);
     
       double magnitude=Math.sqrt((i*i)+(j*j)+(k*k));
     
        JOptionPane.showMessageDialog(null,+magnitude+" units","RESULT",JOptionPane.WARNING_MESSAGE);
    }
} More on java programming