import org.apache.kafka.common.config.ConfigDef;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Vector;

public class test {

    public static void main(String[] args) {
        Vector vec = new Vector();
//添加
        vec.add("1");
        vec.add("2");
        vec.add("3");
        vec.add("4");
        vec.add("5");
//替换
        vec.set(0, "100");
        vec.add(2, "300");

        System.out.println("vec:"+vec);
        System.out.println("vec.indexOf(100):"+vec.indexOf("100"));
        System.out.println("vec.lastIndexOf(100):"+vec.lastIndexOf("100"));
        System.out.println("vec.firstElement():"+vec.firstElement());
        System.out.println("vec.elementAt(2):"+vec.elementAt(2));
        System.out.println("vec.lastElement():"+vec.lastElement());
        System.out.println("size:"+vec.size());
        System.out.println("capacity:"+vec.capacity());
        System.out.println("vec 2 to 4:"+vec.subList(1, 4));
        Enumeration enu = vec.elements();
        while(enu.hasMoreElements())
        {
            System.out.println("nextElement():"+enu.nextElement());
            Vector retainVec = new Vector();
            retainVec.add("100");
            retainVec.add("300");
            System.out.println("vec.retain():"+vec.retainAll(retainVec));
            System.out.println("vec:"+vec);
            String[] arr = (String[]) vec.toArray(new String[0]);
            for (String str:arr)
                System.out.println("str:"+str);
            vec.clear();
            vec.removeAllElements();
            System.out.println("vec.isEmpty():"+vec.isEmpty());
        }
    }
}

java学习之------vector_apache