Java-method overloading

• Method overloading: In the same class (prerequisite), the method name is the same, the parameter list is different, and the return value is irrelevant.
• Call method overload: JVM decides which method overload to call according to the parameter list

public class User {
    
    
    //分别写不同名的方法
    public int addInt(int a, int b) {
    
    
        return a + b;
    }

    public double addDouble(double a, double b) {
    
    
        return a + b;
    }

    //使用重载写方法
    public int add(int a, int b) {
    
    
        return a + b;
    }

    public double add(double a, double b) {
    
    
        return a + b;
    }

    public static void main(String[] args) {
    
    
        //整形和浮点型分别用不同的方法
        User user = new User();
        int sumInt = user.addInt(10, 30);
        System.out.println(sumInt);
        double sumDouble = user.addDouble(1.2D, 8.8D);
        System.out.println(sumDouble);

        //调用重载方法
        sumInt = user.add(66, 88);
        System.out.println(sumInt);
        sumDouble = user.add(66.66, 88.88);
        System.out.println(sumDouble);
    }
}

operation result

40
10.0
154
155.54