java的equals方法

向量類的equals()方法 (Vector 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 this Vector is the same or equals to the given object (ob) or not.

  equals()方法用于檢查此Vector與給定對象(ob)是否相同。

• 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, it returns true when this object and the given object are equal otherwise it returns false.

該方法的返回類型是布爾值 ，當該對象與給定對象相等否則返回假 ，則返回true。

Example:

例：

// Java program to demonstrate the example // of boolean equals(Object ob) method // of Vector import java.util.*;public class EqualsOfVector {public static void main(String[] args) {// Instantiates a Vector object with// initial capacity of "10"Vector < String > v1 = new Vector < String > (10);Vector < String > v2 = new Vector < String > (10);// By using add() method is to add the// elements in this v1v1.add("C");v1.add("C++");v1.add("JAVA");// By using add() method is to add the// elements in this v2v2.add("SQL");v2.add("DBMS");// Display VectorSystem.out.println("v1: " + v1);System.out.println("v2: " + v2);// By using equals() method is to// check whether object v1 and v2 are// equals or notboolean status = v1.equals(v2);// Display statusSystem.out.println("v1.equals(v2): " + status);} }

Output

輸出量

v1: [C, C++, JAVA] v2: [SQL, DBMS] v1.equals(v2): false

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

java的equals方法

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