---------- compile java ----------
ParentClass.java:6: error: class ChildClass is public, should be declared in a file named ChildClass.java
public class ChildClass extends ParentClass{
^
ParentClass.java:7: error: cannot find symbol
public static void main(string[]args){
^
symbol: class string
location: class ChildClass
ParentClass.java:8: error: cannot find symbol
childClass cc=new ChildClass();
^
symbol: class childClass
location: class ChildClass
ParentClass.java:12: error: doStuff(int) in ChildClass cannot override doStuff(int) in ParentClass
public long doStuff(int x){
^
return type long is not compatible with int
4 errors
Output completed (0 sec consumed)