Java中Map的三种遍历方法

Map的三种遍历方法:
1. 使用keySet遍历,while循环;
2. 使用entrySet遍历,while循环;
3. 使用for循环遍历。
 
下面是测试代码,最爱看代码了,啰嗦再多也没用。
 
J2EE_API下载地址: http://download.csdn.net/source/2921112
 
Java面试宝典_pdf版: http://download.csdn.net/source/3563084
 
JSP技术知识点考查: http://download.csdn.net/source/3567902
 
import java.util.*;

public class MapTraverse {
	public static void main(String[] args) {
		String[] str = {"I love you", "You love he", "He love her", "She love me"};
		Map m = new HashMap();
		for(int i=0; i m) {
		Set s = (Set)m.keySet();
		Iterator it = s.iterator();
		int Key;
		String value;
		while(it.hasNext()) {
			Key = it.next();
			value = (String)m.get(Key);
			System.out.println(Key+":\t"+value);
		}
	}
	
	public static void useWhileSentence2(Map m) {
		Set s = m.entrySet();
		Iterator> it = s.iterator();
		Map.Entry entry;
		int Key;
		String value;
		while(it.hasNext()) {
			entry = it.next();
			Key = entry.getKey();
			value = entry.getValue();
			System.out.println(Key+":\t"+value);
		}
	}
	
	public static void useForSentence(Map m) {
		int Key;
		String value;
		for(Map.Entry entry : m.entrySet()) {
			Key = entry.getKey();
			value = entry.getValue();
			System.out.println(Key+":\t"+value);
		}
	}
	
}

欢迎同道中人批评指正!
 

 

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