java数组操作

package com.array;

import java.util.Arrays;

public class TestArray {
public static void main(String[] args) {
outPutArr();
}

/**
* 数组声明
*/
public static void declareArr() {
//1.声明的时候指定数组大小会出错
//int[3] iarr = new int[3];
int[] iArr1 = new int[3];
//2.多维数组不必须是规则矩阵形式
int[][] iArr2 = new int[1][];
int[] iarr3 = new int[4];
iArr2[0] = iarr3;
}

/**
* 数组复制
*/
public static void copyArr() {
int source[] = {1,2,3,4,5};
int dest[] = {10,11,12,13,14};
System.arraycopy(source, 2, dest, 1, 2);

}

/**
* 数组打印
*/
public static void outPutArr() {
int[][] iarr = new int[1][1];
int[] iiarr = {1,2};
iarr[0] = iiarr;
System.out.println(Arrays.toString(iarr[0]));
}

}