Printing from Arraylist<Integer[]>-CodePudding

I need to save info in an Arraylist<Integer[]> type array list named "path". How do I print the values in each position of the arraylist?

ArrayList<Integer[]> path = new ArrayList<Integer[]>(6);
    Integer[] usedPath = new Integer[3];
    for(int i = 0; i < 6; i  ){
        for(int j = 0; j < 3; j  ){
            usedPath[j] = i * 10   1;
        }
        path.add(usedPath);
    }
    for(int i = 0; i < 6; i  ){
        System.out.println(path.get(i)[0]   "  "   path.get(i)[1]   "  "   path.get(i)[2]);
    }

CodePudding user response：

you can use nested loop same as when you fill your array

for(int i = 0; i < 6; i  ){
    for(int j = 0; j < 3; j  ){
        System.out.println(path.get(i)[j]);
    }
}

or use

for(int i = 0; i < 6; i  ){
        System.out.println(Arrays.asList(path.get(i)));
    }

or use stream

 path.stream().map(Arrays::asList).forEach(System.out::println);

it;s not recommend to use for each that has outside effect

CodePudding user response：

you need first iterate over outer Array then you should iterate over inner array, something like below

for(Integer[] integerArray : path){

   
  for(int i=0;i<=integerArray.length;i  ){
     System.out.println(integerArray[i]);
    }
}