class Maxoftwo
{
    public static void main(String args[])
    {
        //taking value as command line argument.
        //Converting String format to Integer value
        int i = Integer.parseInt(args[0]);
        int j = Integer.parseInt(args[1]);
        if(i> j)
            System.out.println(i+" is greater than "+j);
        else
            System.out.println(j+" is greater than "+i);
    }
}

 OUTPUT:

C:\java>javac Maxoftwo.java
 
C:\java>java Maxoftwo 10 20
20 is greater than 10
 
C:\java>java Maxoftwo 30 10
30 is greater than 10
 
Note: C:\>java> is a directory where source and class files exist.