genericsuse.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 21 行

package chapter9;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class GenericsUse {

	public static void main(String[] args) {

		List<String> listnew = new ArrayList<String>();
		listnew.add("123");
		// listnew.add(new Integer(5));
		String element = null;
		for (Iterator<String> iter = listnew.iterator(); iter.hasNext();)
			element = iter.next();
		System.out.println("element is " + element);
	}

}