java二维数组初始化,遍历与查找

java二维数组初始化,遍历与查找

一维数组初始化

1 静态数组

例如：

float[] stuScores = {80.0f,70.0f,90.0f,66.5f};
int[] nums = {8,77, 90,6};
char[] chs = {'a','b', 'c','d'};
String[] name = new String[]{"张三","李四","王五"};

2 动态数组

变量类型[] 数组名 = new  数据类型 [ 数组长度 ];

例如：

int[] scores = new int[2];

int[] scores; 
        scores = new int[2];

二维数组初始化

1 静态数组

int[][] scores = {{1,2},{3,4},{5,6}};

2 动态数组

int[][] scores = new int[2][3];

int[][] scores; 
        scores = new int[2][3];

int[][] scores = new int[2][];
        scores[0] = new int[2];
        scores[1] = new int[3];

3 遍历输出

int[][] scores = {
			{1,2},{3,4},{5,6}
		};
		for(int i = 0;i<scores.length;i++){
			for(int j = 0;j<scores[i].length;j++){
				System.out.print(scores[i][j]);
			}
                        System.out.println();
		}

实际输出

12
34
56

3 查找

import java.util.Scanner;

public class HelloWorld {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] name = new String[]{"张三","张三丰","张无忌","王二","张富贵"};
		String name1 = sc.next();
		for(int i=0;i<name.length;i++){
			if(name1.equals(name[i])){
				System.out.println(name[i]+"在数组的第"+(i+1)+"个位置");
			}
		}
	}
}