index through 2d array

1int[][]x;//define
2for(int i=0;i<x.length;i++){
3  for(int j=0;j<x[i].length;j++){
4    //dp something with x[i][j]
5  }
6}

1int[][]x;//define
2for(int []y:x){
3  for(int a:y){
4    //do something with a
5  }
6}