Based on what you know about Java Generics, convert the IntStack into a generic SimpleStack that can be used to store objects of any class type.
Consider the existing IntStack given below:
import java.util.ArrayList;
import java.util.EmptyStackException;
import java.util.List;
public class IntStack {
private List<Integer> stack ;
public IntStack () {
stack = new ArrayList<>();
}
public boolean empty () {
return stack.size() == 0 ;
}
// push and pop operations
public void push ( Integer obj ) {
stack.add(obj);
}
public Integer pop () {
if (stack.size() <= 0) {
throw new EmptyStackException();
}
return stack.remove(stack.size() - 1);
}
public Integer peek () {
if (stack.size() == 0) {
return null;
}
return stack.get(stack.size() - 1);
}
public boolean hasNext() {
return ( stack.size() > 0 );
}
@Override
public String toString() { return stack.toString(); }
public static void main(String [] args) {
IntStack istack = new IntStack();
istack.push(1);
istack.push(2);
System.out.println(istack);
System.out.println(istack.pop());
System.out.println(istack);
}
}
Based on what you know about Java Generics, convert the IntStack into a generic SimpleStack that can be used to store objects of any class type.
Step by step
Solved in 4 steps with 4 images
