cascading calls to Java functions

Tag: The Count function returns a sample call to a cascading object concat ABC

The method of the string class can be called consecutively: string str= "abc"; String Result=str.trim (). toUpperCase (). Concat ("DEFG");

Please read the source code of the above methods of the string class in the JDK, imitate its programming method, write a MyCounter class, its method also supports the above "cascade" invocation feature,

Examples of its invocation are:

MyCounter counter1=new MyCounter (1);

MyCounter counter2=counter1.increase, decrease (2). Increase (3);

....

Source code of the program:

public class Mycounter {private int a;public Mycounter () {}public Mycounter (int a) {this.a=a;} Public Mycounter Increase (int. x) {This.a=this.a+x;return this;} Public Mycounter Decrease (int. x) {This.a=this.a-x;return this;} public static void Main (string[] args) {Mycounter counter1=new Mycounter (1); Mycounter counter2=counter1.increase, decrease (45); System.out.println (counter2.a);}}

The result of the program is:

Note: In this program, if you want to implement a cascade call like the string type, the type of each function should be this class in the program, returning the object of that class with the this pointer.

cascading calls to Java functions