What are the three ways to initialize arrays in java

The three ways to initialize arrays in java are: 1. Static initialization, such as [int a[] = {2, 0, 1, 9, 2020}]; 2. Dynamic initialization, such as [int[ ] c = new int[4]]; 3. Default initialization, such as [int[]d=new int[5]].

Initialization method:

1. Static initialization

2. Dynamic initialization

3.Default Initialization

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Code sample:

import org.junit.Test;//import org.testng.annotations.Parameters;public class Demo {

    @Test   
    public void test() {
    //数组的静态初始化
        int a[] = {2, 0, 1, 9, 2020};
       System.out.println("----------静态初始化----------");
       getArray(a);       
//数组的动态初始化方法一
        int[] b = new int[10];        
        for (int i = 0; i < b.length; i++) {
            b[i] = i;
        }
       System.out.println("----------动态初始化1----------");
       getArray(b);
       //数组的动态初始化方法二
        int[] c = new int[4];
        c[1] = 2;
        c[2] = 0;
        c[3] = 9;
       System.out.println("----------动态初始化2----------");
       getArray(c);
       //数组的默认初始化，默认初始化只指定数组的长度，数组里面每个元素的值都是默认值
        int[]d=new int[5];
       System.out.println("----------默认初始化----------");
       getArray(d);

    }    public void getArray(int[]arr){        
            for (int j:arr){
            System.out.println(j);
            }
        }
}

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