test.java

这是上学堂马士兵老师教授的javaSE的所有源代码

class BirthDate {
    private int day;
    private int month;
    private int year;
    
    public BirthDate(int d, int m, int y) {
        day = d; 
        month = m; 
        year = y;
    }
    
    public void setDay(int d) {
    	day = d;
  	}
  	
    public void setMonth(int m) {
    	month = m;
    }
    
    public void setYear(int y) {
    	year = y;
    }
    
    public int getDay() {
    	return day;
    }
    
    public int getMonth() {
    	return month;
    }
    
    public int getYear() {
    	return year;
    }
    
    public void display() {
    	System.out.println
        (day + " - " + month + " - " + year);
    }
}


public class Test{
    public static void main(String args[]){
        Test test = new Test();
        int date = 9;
        BirthDate d1= new BirthDate(7,7,1970);
        BirthDate d2= new BirthDate(1,1,2000);    
        test.change1(date);
        test.change2(d1);
        test.change3(d2);
        System.out.println("date=" + date);
        d1.display();
        d2.display();
    }
    
    public void change1(int i){
    	i = 1234;
    }
    
    public void change2(BirthDate b) {
    	b = new BirthDate(22,2,2004);
    }
    
    public void change3(BirthDate b) {
    	b.setDay(22);
    }
}