[method overload]

Method overloading

• In the same class The expression of methods with the same name with different method parameter lists is called method overloading
• parameter list Number of parameters Data type of parameter
• The data type of the parameter here Refers to the data type at the same parameter location
• When the method is called , According to the given parameters , To select the method to call , As shown below

public class Demo03 {
    
    public static void main(String[] args) {
    
   		// When （） The parameters given in are different , The methods selected to call are also different 
        eat();
        eat(" Fruits ");
        eat(" Cherry ", 100);
        eat(2, " Wonton ");
    }

    public static void eat() {
    
        System.out.println(" Don't eat anything ");
    }

    public static void eat(String food) {
    
        System.out.println(" eat " + food);
    }

    public static void eat(String food, int count) {
    
        System.out.println("foodcount eat " + count + " individual " + food);
    }

    public static void eat(int count, String food) {
    
        System.out.println("countfood eat " + count + " bowl " + food);
    }
}

The output is as follows

 Don't eat anything 
 Eat fruit 
foodcount eat 100 A cherry 
countfood eat 2 Bowl wonton