java 数组注意点

                int[] array1 = new int[4];
                int[] array2 = new int[6];
                int[] array3 = new int[8];
                array2 = array1;
                array3 = array1;

                System.out.println(array1.length);
                System.out.println(array2.length);
                System.out.println(array3.length);
                array3[0] = 2;
                System.out.println(array1[0]);
                System.out.println(array2[0]);
                System.out.println(array3[0]);

数组一旦初始化长度不变，array赋值只是引用的变化