What does return mean in java

Return in Java means "return, return"; used for methods, it has two functions: 1. Return the value of the type specified by the method (this value is always determined), or it can be an object; 2. The end method terminates the execution of the code behind "return;".

The return statement in Java is always closely related to methods and is generally used in methods.

The common functions of return are as follows:

One is to return the value of the type specified by the method (this value is always certain), or It is an object

Example:

public string functionTest(){
    String a = "abc";
    return a;
}

Then this method will return a string with the value abc after being called,

public class Test{
    public static void main(){
        string result = functionTest();
        System.out.println(result);
    }
}

The second usage is the end of the method.
For example, when the code is executed to a certain place, several results will appear, and then one of the results cannot execute the subsequent code. At this time, adding a "return;" can terminate the execution of the subsequent code.

Example:

public class TestReturn { 
    public static void main(String args[]) { 
       TestReturn t = new TestReturn(); 
        t.test1(); 
        t.test2(); 
    } 

    /** 
     * 无返回值类型的return语句测试 
     */ 
    public void test1() { 
        System.out.println("---------无返回值类型的return语句测试--------"); 
        for (int i = 1; ; i++) { 
            if (i == 4) return; 
            System.out.println("i = " + i); 
        } 
    } 

    /** 
     * 有返回值类型的return语句测试 
     * @return String 
     */ 
    public String test2(){ 
        System.out.println("---------有返回值类型的return语句测试--------"); 
        return "返回一个字符串"; 
    } 
}

运行结果: 
---------无返回值类型的return语句测试-------- 

 i = 1 

 i = 2

 i = 3  
---------有返回值类型的return语句测试------- 

返回一个字符串

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