myinteger.java

来自「tutorial for java programming」· Java 代码 · 共 54 行

//Exercise 7.5
public class MyInteger {
	//instance variable
	private int value;

	//constructor
	public MyInteger(int value){
		this.value = value;
	}
	//getter and setter
	public int getValue(){
		return value;
	}
	public void setValue(int value){
		this.value = value;
	}

	//other public methods
	public boolean isEven(){//do not need the parameter here
		/*if (value %2 == 0 ){

		}*/
		return (value % 2 == 0);
	}

	public boolean isOdd(){//do not need the parameter here

		return (value % 2 == 0);
	}

	public boolean equals(int another){
		return (value == another);
	}

	public boolean equals(MyInteger another){//another is an instance in MyInteger
		return (this.value == another.value);
	}

	public String toString(){
		return value + "";//convert int(value) to string
	}

	//return the current instance
	//i1.add(i2),update i1 and return i1
	public MyInteger add(MyInteger another){
		this.value += another.value;
		return this;
	}
	public MyInteger multiply(MyInteger another){
		this.value *= another.value;
		return this;
	}
}