Formatting number in Java

Can anyone please tell me how to display the number in 7.50 ie. 2 digit after decimal format? I'm utterly confused after searching thru Java documentation.

public class Test
{
public static void main(String args[])
{
System.out.println("Hello World");
double x=50,z;
z=Math.sqrt(x);

System.out.println("The square root of 50 is " +z);
}
}


Thanx

NumberFormatter class, maybe?

I'm looking for exact syntax/example. I also searched for NumberFormat class but couldn't make it work :mad:

Code:

---

import java.text.DecimalFormat;
import java.text.FieldPosition;
import java.lang.StringBuffer;
import java.text.NumberFormat.Field;
import java.lang.System.*;

class temp
{
        public static void main(String [] args)
        {
                DecimalFormat decFormat = new DecimalFormat("#,##0.00");
                StringBuffer buff = new StringBuffer();
                decFormat.format(1234.56, buff, new FieldPosition(Field.DECIMAL_SEPARATOR));
               
                System.out.println(buff.toString());
        }
}

---