Java programming help 2

public class Polymorphism 
{
	/**
	 * 
	 */
	public static void main(String[] args) 
	{
		// TODO Auto-generated method stub
		Guarantee guarantee1= new Guarantee();
		CompoundInterest compoundInterest1= new CompoundInterest();
		Loan loan1=new Loan();
		
		Scanner input= new Scanner( System.in);
		
		
		// get numbers of screen
		double principle;// 
		double rate;// 
		int years;
		
		System.out.print("Enter principle:");//
		principle= input.nextDouble();// 
		System.out.print("Enter rate:");// 
		rate= input.nextDouble();// 
		System.out.print("Enter years:");//
		years= input.nextInt();// 

		guarantee1.setPrincipleAmount(principle);
		guarantee1.setInterestEarned(rate, years);
	
		
		
		//System.out.printf("Total earned money is\n" +"principleAmount\n" +"InterestEarned\n" +"CompoundInterest\n" + "totalLoanAmount");
		System.out.printf("principle amount of %.2f, An interest rate of %f, you would have earned %.2f",principle, rate, guarantee1.getInterestEarned() );
		
		System.out.print("Enter principle:");//
		principle= input.nextDouble();// 
		System.out.print("Enter rate:");// 
		rate= input.nextDouble();// 
		System.out.print("Enter years:");//
		years= input.nextInt();// 
		
		//
		compoundInterest1.setCompoundInterest(rate,years); 
		
		System.out.printf("Principle amount of %.2f, An interest rate of %.2f, you would have earned %.2f", principle, rate, compoundInterest1.getCompoundInterest());
	
	}
} 
abstract class Funds
{
	
	public double principleAmount;	
	public void setPrincipleAmount(double principle)
	
		{  
			principleAmount =principle;
		
		}
	public double setPrincipleAmount()
	{
		return principleAmount;
	}
		
				
	}


class Guarantee extends Funds

{
	public double InterestEarned;
	public void setInterestEarned(double rate,int years)
	 
	{
		InterestEarned= principleAmount*rate*years;
	}
	
	public double getInterestEarned()
	{
		return InterestEarned;
	}
}

class CompoundInterest extends Funds

{	
	public double CompoundInterest;
	public void setCompoundInterest(double rate,int years)
	{
		CompoundInterest = principleAmount * Math.pow((1+rate),years);
	}
	
		public double getCompoundInterest()
		
		{ 
			return CompoundInterest;
		}
	}


class Loan extends Funds

{
	public double totalLoanAmount;
	
	public void setTotalLoanAmount(double rate, int years)
	{ 
		totalLoanAmount = principleAmount*rate*years +principleAmount;
	}
	
	public double getTotalLoanAmount()
	{
		return totalLoanAmount; 
	}
}

abstract class Funds
{

    private double principleAmount;
    public Funds(double principle) {
        this.principleAmount = principle;
    }

    public double getPrincipleAmount()
    {
        return this.principleAmount;
    }
}

class Guarantee extends Funds

{
    private double InterestEarned;

    public Guarantee(double principleAmount, double rate,int years)

    {
        super(principleAmount);
        InterestEarned = principleAmount * rate * years;
    }

    public double getInterestEarned()
    {
        return InterestEarned;
    }
}