super关键字的作用

使用super关键字可以从子类中调用父类中的构造方法、普通方法和属性，

与this调用构造方法的要求一样，语句必须放在子类构造方法的首行。

package test3;

class Person {
	private String name;
	private int age;

	public Person(String name, int age) {
		this.setName(name);
		this.setAge(age);
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public String getInfo() {
		return "姓名：" + this.getName() + ";年龄：" + this.getAge();
	}
}

class Student extends Person {
	private String school;

	public Student(String name, int age, String school) {
		super(name, age);
		this.setSchool(school);
	}

	public String getSchool() {
		return school;
	}

	public void setSchool(String school) {
		this.school = school;
	}
	public String getInfo(){
		return super.getInfo()+";学校"+this.getSchool();
	}
}

public class SuperDemo01 {
	public static void main(String args[]) {
		Student stu = new Student("张三", 30, "清华大学");
		System.out.println(stu.getInfo());
	}
}

　　结果：

姓名：张三;年龄：30;学校清华大学