Using EntrySet() and java Iterator – In this way we Iterate Map Entries (Keys and Values) with the help Iterator Using keyset() and java Iterator – Here we Iterate Map Keys Only with the help of Iterator Iter
In this post, I decided to compare the performance of different ways to traverse through theHashMapin Java.HashMapis a very widely used class, and most of the time, we fetch the value usingget(Object key)method provided by the class. But it is sometimes required to iterate over the whol...
javaiteratejavaiteratehashmap Java上遍历HashMap的五种最佳方式如下使用Iterator遍历HashMap EntrySet使用Iterator遍历HashMap KeySet使用For-each循环迭代HashMap使用Lambda表达式遍历HashMap使用Stream API遍历HashMap示例代码如下package imoocStudy; importjava.util.HashMap; import j ...
Java上遍历HashMap的五种最佳方式如下使用Iterator遍历HashMap EntrySet使用Iterator遍历HashMap KeySet使用For-each循环迭代HashMap使用Lambda表达式遍历HashMap使用Stream API遍历HashMap示例代码如下package imoocStudy; importjava.util.HashMap; import j java iterate ...
Step 4 Create a new instance of the HashMap class called foodTable with key and value of type String. Step 5 Add elements to the foodTable using the put method. Step 6 Start a loop to iterate over the entries in the foodTable using the entrySet method. Step 7 Within each iteration...
Method 4: Using Map's entrySet() method and enhanced for loop while() The given code creates a Hashtable and populates it with key-value pairs representing fruits and their corresponding colors. It then iterates through the entries in the Hashtable and prints each fruit with its respective ...
There are several ways to iterate over the entries in a Map in Java. Here are some options: For-each loop: You can use a for-each loop to iterate over the entrySet of the Map. This is the most concise option: Map<String, Integer> map = new HashMap<>(); // add some entries ...
long i = 0; for (Iterator<Map.Entry<Integer, Integer>> entries = map.entrySet().iterator(); entries.hasNext(); ) { Map.Entry<Integer, Integer> entry = entries.next(); i += entry.getKey() + entry.getValue(); }Using the Java 8 Stream API final long[] i = {0}; map.entrySet...
javaiteratejavaiteratehashmap Java上遍历HashMap的五种最佳方式如下使用Iterator遍历HashMap EntrySet使用Iterator遍历HashMap KeySet使用For-each循环迭代HashMap使用Lambda表达式遍历HashMap使用Stream API遍历HashMap示例代码如下package imoocStudy; import java.util.HashMap; import j ...
java iterate java iterate hashmap Java上遍历HashMap的五种最佳方式如下使用Iterator遍历HashMap EntrySet使用Iterator遍历HashMap KeySet使用For-each循环迭代HashMap使用Lambda表达式遍历HashMap使用Stream API遍历HashMap示例代码如下package imoocStudy; import java.util.HashMap; import j java iterate System java ...