stackl.java

来自「thinking in Java书中 的源代码」· Java 代码 · 共 27 行

//: c09:StackL.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Making a stack from a LinkedList.
import java.util.*;
import com.bruceeckel.util.*;

public class StackL {
  private LinkedList list = new LinkedList();
  public void push(Object v) {
    list.addFirst(v);
  }
  public Object top() { return list.getFirst(); }
  public Object pop() { 
    return list.removeFirst(); 
  }
  public static void main(String[] args) {
    StackL stack = new StackL();
    for(int i = 0; i < 10; i++)
      stack.push(Collections2.countries.next());
    System.out.println(stack.top());
    System.out.println(stack.top());
    System.out.println(stack.pop());
    System.out.println(stack.pop());
    System.out.println(stack.pop());
  }
} ///:~