How to implement array initialization in java

Java method to implement array initialization: 1. Dynamic initialization, format [data type [] array name = new data type [array length]]; 2. Static initialization, format [data type [] array name = new data type [ ]{element 1, element 2, element 3...}].

How to implement array initialization in java:

1. Static initialization

2. Dynamic Initialization

format:

1. Dynamic initialization format:

数据类型 [ ] 数组名称 = new 数据类型[数组长度]

2. Static initialization format:

数据类型 [ ] 数组名称 = new 数据类型[ ]{元素1，元素2，元素3…}

3. Static Initialization omitted format:

数据类型 [ ] 数组名称 = {元素1，元素2，元素3…}

Dynamic initialization:

public class DynamicArray {
    public static void main(String[] args) {
        int i = 5;
        int[] arrayA = new int[5];//动态数组的标准分配
        arrayA[0] = 1;
        arrayA[1] = 2;
        arrayA[2] = 3;
        System.out.printf("%d\n%d\n%d\n", arrayA[0], arrayA[1], arrayA[2]);
        int[] arrayB;//动态数组分步分配
        arrayB = new int[i];
        arrayB[0] = 4;
        arrayB[1] = 5;
        arrayB[2] = 6;
        System.out.printf("%d\n%d\n%d\n", arrayB[0], arrayB[1], arrayB[2]);
    }
}

Static initialization:

public class StaticArray {
    public static void main(String[] args) {
        int[] arrayA = new int[]{10, 20, 30};//静态数组标准分配
        System.out.printf("%d\n%d\n%d\n", arrayA[0], arrayA[1], arrayA[2]);
        arrayA[0] = 20;
        System.out.printf("%d\n%d\n%d\n", arrayA[0], arrayA[1], arrayA[2]);
        char[] arrayB;
        arrayB = new char[]{'大', '来', '嘞'};
        System.out.printf("%c\n%c\n%c\n", arrayB[0], arrayB[1], arrayB[2]);//静态数组两步骤分配
        int[] arrayC = {30, 40, 50};// 静态数组省略式分配，注意省略不可以分两步骤
        System.out.printf("%d\n%d\n%d\n", arrayA[0], arrayA[1], arrayA[2]);
    }
}

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