mindol1004/spring-boot-rest
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BAEL-4719 - Using the Map.Entry Java Class (#10428)

Browse Source 
* BAEL-4719

Using the Map.Entry Java Class

* BAEL-4719

Using the Map.Entry Java Class

* BAEL-4719

Change description

* BAEL-4719

Feedback from first draft
This commit is contained in:
dvyshd
2021-01-28 23:53:49 +00:00
committed by GitHub
parent a478360382
commit ab0b2df9e4
4 changed files with 127 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
java-collections-maps-3/src/main/java/com/baeldung/map/entry/MapEntryEfficiencyExample.java Normal file
View File

@@ -0,0 +1,34 @@
package com.baeldung.map.entry;
import java.util.HashMap;
import java.util.Map;
public class MapEntryEfficiencyExample {
public static void main(String[] args) {
MapEntryEfficiencyExample mapEntryEfficiencyExample = new MapEntryEfficiencyExample();
Map<String, String> map = new HashMap<>();
map.put("Robert C. Martin", "Clean Code");
map.put("Joshua Bloch", "Effective Java");
System.out.println("Iterating Using Map.KeySet - 2 operations");
mapEntryEfficiencyExample.usingKeySet(map);
System.out.println("Iterating Using Map.Entry - 1 operation");
mapEntryEfficiencyExample.usingEntrySet(map);
}
public void usingKeySet(Map<String, String> bookMap) {
for (String key : bookMap.keySet()) {
System.out.println("key: " + key + " value: " + bookMap.get(key));
}
}
public void usingEntrySet(Map<String, String> bookMap) {
for (Map.Entry<String, String> book: bookMap.entrySet()) {
System.out.println("key: " + book.getKey() + " value: " + book.getValue());
}
}
}