multi dimensional list in java code example
Example 1: 2d arraylist in java
int vertexCount = 3;
ArrayList<ArrayList<Integer>> graph = new ArrayList<>(vertexCount);
//Next, we'll initialize each element of ArrayList with another ArrayList:
for(int i=0; i < vertexCount; i++) {
graph.add(new ArrayList());
}
Example 2: how to create a 2d arraylist java
ArrayList<ArrayList<Object>> a = new ArrayList<ArrayList<Object>>();