java 数组的定义方式

1. 方式一 String[] arr = new String[2];
2. 方式二 String[] arr = {“张三”, “李四”};
3. 方式三 String[] arr = new String[]{“张三”, “李四”};

新建 ArrayTest

public class ArrayTest {
    public static void main(String[] args) {
        ArrayTest arrayTest = new ArrayTest();
//        arrayTest.test01();
//        arrayTest.test02();
        arrayTest.test03();

    }

    
    public void test01(){
        String[] arr = new String[2];
        arr[0] = "张三";
        arr[1] = "李四";

        for(String str: arr){
            System.out.println(str);
        }
    }


    
    public void test02(){
       String[] arr  = {"张三", "李四"};
       for(String str: arr){
           System.out.println(str);
       }
    }

    
    public void test03(){
        String[] arr = new String[]{"张三", "李四"};
        for(String str: arr){
            System.out.println(str);
        }
    }
}