Extend a java class from one file in another java file

Question

How can I include one java file into another java file?

For example: If I have 2 java file one is called Person.java and one is called Student.java. How can I include Person.java into Student.java so that I can extend the class from Person.java in Student.java

Answer 1

Just put the two files in the same directory. Here's an example:

Person.java

public class Person {   public String name;    public Person(String name) {     this.name = name;   }    public String toString() {     return name;   } } 

Student.java

public class Student extends Person {   public String somethingnew;    public Student(String name) {     super(name);     somethingnew = "surprise!";   }    public String toString() {     return super.toString() + "\t" + somethingnew;   }    public static void main(String[] args) {     Person you = new Person("foo");     Student me = new Student("boo");      System.out.println("Your name is " + you);     System.out.println("My name is " + me);   } } 

Running Student (since it has the main function) yields us the desired outcome:

Your name is foo My name is boo  surprise!