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
