LinkedHashMap類的forEach()方法 (LinkedHashMap Class forEach() method)

• forEach() method is available in java.util package.

  java.util包中提供了forEach()方法 。

• forEach() method is used to perform the specified action for every entry (key-value) pairs in the LinkedHashMap till all the entries have been executed.

  forEach()方法用于對LinkedHashMap中的每個條目(鍵值)對執(zhí)行指定的操作，直到執(zhí)行完所有條目為止。

• forEach() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  forEach()方法是一種非靜態(tài)方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• forEach() method does not throw an exception at the time of acting.

  forEach()方法在執(zhí)行操作時不會引發(fā)異常。

Syntax:

句法：

public void forEach(BiConsumer actions);

Parameter(s):

參數(shù)：

• BiConsumer actions – represents the action to be performed.

  BiConsumer操作 –表示要執(zhí)行的操作。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內(nèi)容。

Example:

例：

// Java program to demonstrate the example // of void forEach(BiConsumer actions) method // of LinkedHashMap import java.util.*;public class ForEachOfLinkedHashMap {public static void main(String[] args) {// Instantiates a LinkedHashMap objectMap < Integer, String > map = new LinkedHashMap < Integer, String > () {};// By using put() method is to add// key-value pairs in a LinkedHashMapmap.put(10, "C");map.put(20, "C++");map.put(50, "JAVA");map.put(40, "PHP");map.put(30, "SFDC");// Display LinkedHashMapSystem.out.println("LinkedHashMap: " + map);// By using forEach() method is to// iterate the objects exists// in this LinkedHashMapmap.entrySet().stream().forEach((bi) -> {System.out.println(bi.getKey() + " " + bi.getValue());});} }

Output

輸出量

LinkedHashMap: {10=C, 20=C++, 50=JAVA, 40=PHP, 30=SFDC} 10 C 20 C++ 50 JAVA 40 PHP 30 SFDC

翻譯自: https://www.includehelp.com/java/linkedhashmap-foreach-method-with-example.aspx

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