Calculation of Simple and compound Interest

Java Code for First.java

package pack;

public class First
{
    static double amt,sim,comp,princ = 1000,rate = 0.09;
    statici nt  n=2;

    public First()
    {
        System.out.println("\n...Welcome to First Class\n");
    }

public static void DisplayData()
{
System.out.println("Principle Amount\t:"+princ+"\nRate Of Interest\t:"+rate*100+"%");
System.out.println("Term\t\t\t:"+n);
}
public static void SimpleInterest()
{
System.out.println("\nDisplaying Simple Interest...");
try 
{
Thread.sleep(1000); // do nothing for 1000 miliseconds (1 second)
catch(InterruptedException e)
{
e.printStackTrace();
sim = (princ*n*rate);
System.out.println("\tInterest\t: "+sim);
}

public static void CompInterest()
{
    System.out.println("\nDisplaying Compound Interest...");
try 
{
Thread.sleep(1000); // do nothing for 1000 miliseconds (1 second)
catch(InterruptedException e)
{
e.printStackTrace();
double ans = princ*(1+rate/n);
comp = Math.pow(ans,(double)n*4.0);
System.out.println("\tInterest\t: "+comp);
}
public static void main(String []args)
{
First f= new First();
f.DisplayData();
f.SimpleInterest();
f.CompInterest();
}
}
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