哈希表類equals()方法 (Hashtable Class equals() method)

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

  equals()方法在java.util包中可用。

• equals() method is used to check whether equality of this Hashtable with the given Object or not.

  equals()方法用于檢查此Hashtable與給定Object是否相等。

• equals() 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.

  equals()方法是一種非靜態方法，僅可通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

• equals() method does not throw an exception at the time of checking the equality of two objects.

  在檢查兩個對象的相等性時， equals()方法不會引發異常。

Syntax:

句法：

public boolean equals(Object ob);

Parameter(s):

參數：

• Object ob – represents the object to be checked for equality.

  對象ob –表示要檢查其是否相等的對象。

Return value:

返回值：

The return type of the method is boolean,

方法的返回類型為boolean 。

• It returns true when this Hashtable is the same as the given object.

  當此Hashtable與給定對象相同時，它返回true 。

• It returns false when this Hashtable is not the same as the given object.

  當此哈希表與給定對象不同時，它返回false 。

Example:

例：

// Java program to demonstrate the example // of boolean equals(Object ob) method of Hashtable import java.util.*;public class EqualsOfHashtable {public static void main(String[] args) {// Instantiate two hashtable object Hashtable ht = new Hashtable();Hashtable comp_ht = new Hashtable();// By using put() method is to// add the linked values in an Hashtable htht.put(10, "C");ht.put(20, "C++");ht.put(30, "JAVA");ht.put(40, "PHP");ht.put(50, "SFDC");// By using put() method is to// add the linked values in an// Hashtable comp_htcomp_ht.put(60, "COBOL");comp_ht.put(70, "HTML");// Display HashtableSystem.out.println("Hashtable: " + ht);// By using equals() method isto// check equality of two hashtable objectsboolean status = ht.equals(comp_ht);// Display Status of HashtableSystem.out.println("ht.equals(comp_ht): " + status);} }

Output

輸出量

Hashtable: {10=C, 20=C++, 30=JAVA, 40=PHP, 50=SFDC} ht.equals(comp_ht): false

翻譯自: https://www.includehelp.com/java/hashtable-equals-method-with-example.aspx

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