1.二維數組  ~~~ package array; public class Array11 { public static void main(String[] args){ //多維數組 int[][] arr={{24,43},{65,76,87},{43,543,75},{54,34,65,7600}}; System.out.println(arr[3][3]); //7600 } } ~~~  ~~~ package array; public class Array12 { public static void main(String[] args){ //聲明 int[][] arr=new int[3][]; arr[0]=new int[3]; arr[1]=new int[2]; arr[2]=new int[2]; //存數據 for(int i=0;i<arr[0].length;i++){ arr[0][i]=i+5; } for(int i=0;i<arr[0].length;i++){ System.out.println(arr[0][i]); } } } ~~~