JAva配列のいくつかの作成方法

package array;

import static org.junit.Assert.*;

import org.junit.Test;

public class Array1 {

	@Test
	public void array1() {
		/*    */
		/*1.      5      */
		int[] a1=new int[5];
		/*2.    ，    */
		int[] a2=new int[]{1,2,3,4,5,6};
		/*3.         */
		int[] a3={1,2,3,4,5,6};
		
		System.out.println("a1   ："+a1.length);
		for(int i=0;i<a2.length;i++){
			System.out.println("a2="+a2[i]);
		}
		for(int j=0;j<a3.length;j++){
			System.out.println("a3="+a3[j]);
		}
	}

}

package array;

import static org.junit.Assert.*;

import org.junit.Test;

public class Array2 {

	@Test
	public void test() {
		/*            */
		int[][] a1=new int[3][2];
		a1[0][0]=1;
		a1[0][1]=2;
		a1[1][0]=3;
		a1[1][1]=4;
		a1[2][0]=5;
		a1[2][1]=6;
		/*            */
		String[][] a2={{"q","w"},{"e","r"},{"t","y"}};
		
		System.out.println("       ");
		for(int i=0;i<a1.length;i++){
			for(int j=0;j<a1[i].length;j++){
				System.out.print(a1[i][j]+"　　");
			}
			System.out.println();
		}
		System.out.println("       ");
		for(int i=0;i<a2.length;i++){
			for(int j=0;j<a2[i].length;j++){
				System.out.print(a2[i][j]+"　　");
			}
			System.out.println();
		}
	}

}