Miscellany

public class TwoDimensions {
    
    public static void main(String[] args) {
    	
    	int a[][]= new int[10][10];
		
		for( int i = 0; i < 10; i++ ) {
			for( int j = 0; j < 10 - i; j++) 
			
			
				System.out.print(a[i][j] = j);
			}
		}
}