Java 中的 Vector equals()方法
原文:https://www.geeksforgeeks.org/vector-equals-method-in-java/
T1。Java 中 Vector 类的 equals(Object obj) 方法用于验证一个对象与一个向量的相等性并进行比较。只有当两个向量包含相同顺序的相同元素时,列表才返回 true。
语法:
first_vector.equals(second_vector)
参数:该方法接受一个强制参数 second_vector ,它指的是要与第一个 vector 进行比较的第二个 Vector。
返回值:该方法返回真如果等式成立,并且对象和向量相等,则返回假。
下面的程序用来说明 java.util.Vector.elements()方法的工作原理:
程序 1:
// Java code to illustrate the equals() method
import java.util.*;
public class Vector_Demo {
public static void main(String[] args)
{
// Creating an empty Vector
Vector<String> vec_tor1 = new Vector<String>(5);
// Inserting elements into the table
vec_tor1.add("Geeks");
vec_tor1.add("4");
vec_tor1.add("Geeks");
vec_tor1.add("Welcomes");
vec_tor1.add("You");
// Displaying the Vector
System.out.println("The Vector is: "
+ vec_tor1);
// Creating an empty Vector
Vector<String> vec_tor2 = new Vector<String>(5);
// Inserting elements into the table
vec_tor2.add("Geeks");
vec_tor2.add("4");
vec_tor2.add("Geeks");
vec_tor2.add("Welcomes");
vec_tor2.add("You");
// Displaying the Vector
System.out.println("The Vector is: "
+ vec_tor2);
System.out.println("Are both of them equal? "
+ vec_tor1.equals(vec_tor2));
}
}
Output:
The Vector is: [Geeks, 4, Geeks, Welcomes, You]
The Vector is: [Geeks, 4, Geeks, Welcomes, You]
Are both of them equal? true
程序 2 :
// Java code to illustrate the equals() method
import java.util.*;
public class Vector_Demo {
public static void main(String[] args)
{
// Creating an empty Vector
Vector<Integer> vec_tor1 = new Vector<Integer>(5);
// Inserting elements into the table
vec_tor1.add(10);
vec_tor1.add(15);
vec_tor1.add(20);
vec_tor1.add(25);
vec_tor1.add(30);
// Displaying the Vector
System.out.println("The Vector is: " + vec_tor1);
// Creating an empty Vector
Vector<Integer> vec_tor2 = new Vector<Integer>(6);
// Inserting elements into the table
vec_tor2.add(10);
vec_tor2.add(15);
vec_tor2.add(20);
vec_tor2.add(25);
vec_tor2.add(30);
vec_tor2.add(40);
// Displaying the Vector
System.out.println("The Vector is: " + vec_tor2);
System.out.println("Are both of them equal? "
+ vec_tor1.equals(vec_tor2));
}
}
Output:
The Vector is: [10, 15, 20, 25, 30]
The Vector is: [10, 15, 20, 25, 30, 40]
Are both of them equal? false
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