how to crate an array of integers in java

1int intArray[];    //declaring array
2intArray = new int[20];  // allocating memory to array
3//OR
4int[] intArray = new int[20]; // combining both statements in one

1int[] theNumbers = new int[5];
2
3arr[0] = 4;
4arr[1] = 8;
5arr[2] = 15;
6arr[3] = 16;
7arr[4] = 23;
8arr[5] = 42;

1 int[] intArray = new int[]{ 1,2,3,4,5,6,7,8,9,10 };