constructsequence.java

java程序设计源代码

class ConstructSequence 
{
	public static void main(String[] args){ 
		Person p = new Student("李明", 18, "北大");
	}
}

class Person
{
	String name="未命名"; 
	int age=-1;
	Person( String name, int age ){
		System.out.println( "开始构造Person(),此时this.name="+this.name+",this.age="+this.age );
		this.name=name; this.age=age; 
		System.out.println( "Person()构造完成,此时this.name="+this.name+",this.age="+this.age );
	}
}

class Student extends Person
{
	String school="未定学校";
	Student( String name, int age, String school ){
		super( name, age );
		System.out.println( "开始构造Student(),此时this.name="+this.name+",this.age="+this.age+",this.school="+this.school );
		this.school = school;
		System.out.println( "Student()构造完成,此时this.name="+this.name+",this.age="+this.age+",this.school="+this.school );
	}
}