testarraylist.java

来自「本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书」· Java 代码 · 共 37 行

package apibook.c2.s1;

import java.util.*;

public class TestArrayList {

  public TestArrayList() {
  }
  public static void printElem(ListIterator iter){
    while(iter.hasNext()){
      System.out.println(iter.next());
    }
  }
  public static void main(String[] args) {
    LinkedList list = new LinkedList();
    ListIterator iter1 = list.listIterator();
    iter1.add("Obj1");
    iter1.add("Obj2");
    iter1.add("Obj3");
    ArrayList al = new ArrayList(list);
    ListIterator iter2 = al.listIterator();
    TestArrayList.printElem(iter2);
    System.out.println("---------------------------------");
    al.add("Obj4");
    al.add(1,"Obj5");
    ListIterator iter3 = al.listIterator();
    TestArrayList.printElem(iter3);
    if(al.contains("Obj5")) System.out.println("This ArrayList contains the element 'Obj5'");
    al.set(1,"newObj1");
    System.out.println(al.get(1));
    System.out.println(al.size());
    al.remove(0);
    al.remove(3);
    al.trimToSize();
    System.out.println(al.size());
  }
}