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Map TreeMap key value pair sort by key, using of iterator Java Android example


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Map TreeMap key value pair, Map sort by key, Iterator for Map Java Android example.

MainClass.java

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

public class MainClass {
	public static void main(String[] arg) {
		
		// english;germany dictionary
		String[] arrayOfString = { "one;eine", "two;zwei", "three;drei", "four;vier" };

		Map<String, String> map = new TreeMap<String, String>();
	    
		for(String s: arrayOfString){
	    	String[] array = s.split(";");
	    	String sKey ="", sValue="";
	    	if(array.length > 1){
	    	sKey = array[0]; sValue = array[1];
	    		map.put(sKey, sValue);
	    	}
	    }
		List sortedByKeys=new ArrayList(map.keySet());
		Collections.sort(sortedByKeys);
		
            // iterate map
	    Set references = map.keySet();
	    Iterator it = references.iterator();
	    while (it.hasNext()) {
	      String key = (String) it.next();
	      String value = map.get(key);
	      System.out.println(key + " = " + value);
	    }
            // or other example how iterate map
	    TreeSet<String> keys = new TreeSet<String>(map.keySet());
	    for (String key : keys) { 
	       String value = map.get(key);
	       System.out.println(key + " = " + value);
	       
	    }		


		
       // check if key exists 	    
//	   if( map.containsKey("two")){
//		System.out.print("two = " + map.get("two"));
//	   }
	}
}
/*
four = vier
one = eine
three = drei
two = zwei
 */

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Editace: 2013-12-09 13:29:38
Počet článků v kategorii: 397
Url:map-treemap-key-value-pair-sort-by-key-using-of-iterator-java-android-example

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