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Method Overriding-2


Example6:-


class Teacher
{
protected void disp()
{
System.out.println("Parent implemented disp method");
}
}
class Student extends Teacher
{
protected void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Student s=new Student();
s.disp();
}
}

Output:-

C:\JAVATECH>javac Test.java
C:\JAVATECH>java Test
Child implemented disp method


Example7:-


class Teacher
{
void disp()
{
System.out.println("Parent implemented disp method");
}
}
class Student extends Teacher
{
public void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Student s=new Student();
s.disp();
}
}

Output:-

C:\JAVATECH>javac Test.java
C:\JAVATECH>java Test
Child implemented disp method


Example8:-


class Teacher
{
protected void disp()
{
System.out.println("Parent implemented disp method");
}
}
class Student extends Teacher
{
 void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Student s=new Student();
s.disp();
}
}

Output:-

C:\JAVATECH>javac Test.java
Test.java:10: error: disp() in Student cannot override disp() in Teacher
void disp()
     ^
  attempting to assign weaker access privileges; was protected
1 error


Example9:-


class Teacher
{
void disp()
{
System.out.println("Parent implemented disp method");
}
}
class Student extends Teacher
{
void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Teacher t=new Teacher();
t.disp();
}
}

Output:-

C:\JAVATECH>javac Test.java
C:\JAVATECH>java Test
Parent implemented disp method


Example10:-


class Teacher
{
void disp()
{
System.out.println("Parent implemented disp method");
}
}
class Student extends Teacher
{
void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Teacher t=new Student();
t.disp();
}
}


Output:-

C:\JAVATECH>javac Test.java
C:\JAVATECH>java Test
Child implemented disp method


Example11:-


class Teacher
{

}
class Student extends Teacher
{
void disp()
{
System.out.println("Child implemented disp method");
}
}
class Test
{
public static void main(String[]args)
{
Teacher t=new Student();
t.disp();
}
}

Output:-

C:\JAVATECH>javac Test.java
Test.java:17: error: cannot find symbol
t.disp();
 ^
  symbol:   method disp() location: variable t of type Teacher
1 error


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