Loop through the items of a HashMap with a for-each loop.Note: Use the keySet() method if you only want the keys, and use the values() method if you only want the values:ExampleGet your own Java Server // Print keys for (String i : capitalCities.keySet()) { System.out.println(...
1. Using the forEach loop packagecom.programiz.hashmap;importjava.util.HashMap;importjava.util.Map.Entry;publicclassForEachLoop{publicstaticvoidmain(String[] args){// Creating a HashMapHashMap<String, Integer> numbers =newHashMap<>(); numbers.put("One",1); numbers.put("Two",2); numbers...
package cn.trinea.java.test; import java.text.DecimalFormat; import java.util.Calendar; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.Set; /** * JavaLoopTest * * @author www.trinea.cn 2013-10-28 */ public class...
package cn.trinea.java.test; import java.text.DecimalFormat; import java.util.Calendar; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.Set; /** * JavaLoopTest * * @author www.trinea.cn 2013-10-28 */ public class...
With forEach we iterate over all pairs of the map. Iteration with enhanced for loopThe enhanced for loop can be used to iterate over a HashMap. Main.java import java.util.HashMap; import java.util.Map; void main() { Map<String, String> capitals = new HashMap<>(); capitals.put("...
Loop Through a HashMap Loop through the items of aHashMapwith afor-eachloop. Note:Use thekeySet()method if you only want the keys, and use thevalues()method if you only want the values: Example // Print keysfor(Stringi:capitalCities.keySet()){System.out.println(i);} ...
}/*It just traversed the values, not the keys*/privatestaticvoidpartForEachTraversal(Map<String, Object>map){ System.out.println("\nUse values to loop, can only traverse values, not keys");longstart = System.currentTimeMillis();for(Object value :map.values()) { ...
clear(); // Iterating over elements using for each loop for (Map.Entry<String, Integer> entry : list) { // Put all sorted value back to the // LinkedHashMap l_map.put(entry.getKey(), entry.getValue()); } // Display and print // the sorted value of LinkedHashMap System.out...
//iteration over map using for each loop for(Map.Entryentry: hm.entrySet()) { //getting keys and values using method System.out.println(entry.getKey() + " = " +entry.getValue()); } /*---TreeMap implementation---*/ Map tm=new TreeMap(); //adding...
To learn more about lambda expression, visit Java Lambda Expressions. Note: The forEach() method is not the same as the for-each loop. We can use the Java for-each loop to loop through each entry of the hashmap. Also Read: Java ArrayList forEach() Previous...