Here is a code that displays the following pattern:

1 
2 1
3 2 1
4 3 2 1
5 4 3 2 1

class Pattern{
     public static void displayPattern(int n){
        for(int i=1;i<=n;i++){

            for(int j=i;j>=1;j--){
            System.out.print(j);
            }
            System.out.println();
           }
     }
     public static void main(String args[]){
          displayPattern(5);       
    }
}