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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. interface DisplayStack{
  7.     void display();
  8. }
  9. class Parent {
  10.     protected void display() {
  11.         System.out.println("parent display method");
  12.     }
  13. }
  14. class Child extends Parent implements DisplayStack{
  15.     protected void display() {
  16.         System.out.println("Child display method");
  17.     }
  18. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:15: error: display() in Child cannot implement display() in DisplayStack
    protected void display() {
                   ^
  attempting to assign weaker access privileges; was public
1 error
stdout
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Standard output is empty
https://ideone.com/RdykXh
language:
Java (12.0.1)
created:
6 years ago
visibility:
public

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