Use and output of two-dimensional array

Use and output of two-dimensional array:

package day02;

public class ArraryTwo {
public static void main(String[] args) {
	int data [] [] = new int [][] {
    
    {1,2},{3,4},{5,6}}  ;  //定义3行2列的数组
    //普通for循环输出
    for (int i = 0; i < data.length; i++) {
		for (int j = 0; j < data[i].length; j++) {
			System.out.println(data[i][j]);
		}
		//foreach输出
		for(int temp[] :data) {
			for(int num : temp){
				System.out.println(num);
			}
			System.out.println();
		}
	}
}
}

 

Initialize array and output by method

package day02;

public class initArray {
public static void main(String[] args) {
	int data [] =initArray();  //通过方法调用数组，完成初始化
	printArray(data);  //调用方法打印数组
}
//打印数组方法
private static void printArray(int[] data) {
	for (int i = 0; i < data.length; i++) {
		System.out.println(data[i]);
	}
	
}
//数组初始化方法
private static int[] initArray() {
	int arr [] = new int [] {1,2,3,4,5,6};
	return arr;
}

}