2017.12.13 Java中是怎样通过类名，创建一个这个类的数组

先在类方法中定义数组的方法:

public int[] method6(int[] arr){
		for(int i = 0; i<arr.length;i++){
		 arr[i] = (int)(Math.random()*10+1);
		}
		return arr;
	}

在类方法中返回类名就可以了

---

在测试类中提取出来：

int[] arr = new int[10];//数组的接收需要考虑要遍历接收
	for(int q = 0;q<arr.length;q++){
		int[] arr1 = com.method6(arr);
		System.out.print(arr1[q]+"\t");
		//int[q] arr = ;
		}

//定义一个电脑类，里面不含有属性但是有方法；

package demo;
public class Computer {
	public boolean method(int a){
		boolean flag;
		//int a = 0;
		if(a%2==0){
			flag = true;
		}else{
			flag = false;
		}
		return flag;
	}

	public int method2(int year){
		if(year%400==0| year%4==0&&year%100!=0){
		return 1;
		}else{
			return 0;
			}
		}

	public int  method3(int A,int B){
		int sum = A+B;
		return sum;
	}

	public int method4(int i,int j){
		int Mul = i*j;
		return Mul;
	}

	public int method5(int c,int d){
		int Max;
		if(c>d){
			Max = c;
		}else{
			 Max = d;
		}
		return Max;
	}

	public int[] method6(int[] arr){
		for(int i = 0; i<arr.length;i++){
		 arr[i] = (int)(Math.random()*10+1);
		}
		return arr;
	}
}

//测试类含有main操作的程序入口标识

package demo;
import java.util.*;
public class Test4 {
public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	Computer com = new Computer();

	System.out.println("请输入一个数字：");
	int a= sc.nextInt();
	boolean flag = com.method(a);
	System.out.println(flag);

	System.out.print("请输入年份：");
	int year = sc.nextInt();
	int b = com.method2(year);
	System.out.println(b);

	int A = 5;
	int B = 6;
	int sum = com.method3(A, B);
	System.out.println(sum);

	System.out.println("请输入两个数：");
	int i = sc.nextInt();
	int j = sc.nextInt();
	int Mul = com.method4(i, j);
	System.out.println(Mul);

	int Max = com.method5(8, 6);
	System.out.println(Max);

	int[] arr = new int[10];//数组的接收需要考虑要遍历接收
	for(int q = 0;q<arr.length;q++){
		int[] arr1 = com.method6(arr);
		System.out.print(arr1[q]+"\t");
		//int[q] arr = ;
		}
	}
}