技術標籤：java

class Student{
	private int age;
	String name;
	double score;
	
	Student(){
		System.out.println("構造方法一被呼叫");
	}
	
	Student(int newage, String newname){
		System.out.println("構造方法二被呼叫");
		age = newage;
		name = newname;
	}
	
	Student(int newage, String newname, double
 
 newscore){
		System.out.println("構造方法三被呼叫");
		age = newage;
		name = newname;
		score = newscore;
	}
}


public class Test {
	public static void main(String[] args) {
		Student stu1 = new Student();
		Student stu2 = new Student(18, "czx");
		Student stu3 = new Student(18, "czx"
 
, 99.5);
	}
}

執行結果