Thread: Program won't run help!

/**
* @author iridebmxnj
*
*/
public class PiggyBank {

/**
* @param args
*/
public static void main(String[] args) {}
// TODO Auto-generated method stub

private int numPennies;
private int numNickels;
private int numDimes;
private int numQuarters;



/**
* Constructor for objects of class PiggyBank
*/
public PiggyBank()
{
numPennies =0;
numNickels = 0;
numDimes = 0;
numQuarters = 0;
}

public PiggyBank (int p, int n, int d, int q)
{
numPennies = p;
numNickels = n;
numDimes = d;
numQuarters = q;
}

public void insertPenny()
{
}

public void insertNickel()
{
}

public void insertDime()
{
}

public void insertQuarter()
{
}

public void insertPennies(int p)
{
numPennies = numPennies + p;
}

public void insertNickels(int n)
{
numNickels = numNickels + n;
}

public void insertDimes(int d)
{
numDimes = numDimes + d;
}

public void insertQuarters(int q)
{
numQuarters = numQuarters + q;
}

public int getTotalAmount ()
{
return (numPennies + 5*numNickels + 10*numDimes + 25*numQuarters);
}

public void printContents()
{
System.out.println("The number of pennies: " + numPennies);
System.out.print("The total value of pennies:" + 1*numPennies);
System.out.println("The number of nickels: " + numNickels);
System.out.print("The total value of nickels:" + 5*numNickels);
System.out.println("The number of dimes: " + numDimes);
System.out.print("The total value of dimes:" + 10*numDimes);
System.out.println("The number of quarters: " + numQuarters);
System.out.print("The total value of nickels:" + 25*numQuarters);
}


}

nothing happens when I run the program no error just blanks

Sorry I'm really new at this how can I add it to my main method?