Java 中的 Stack equals()方法，示例
原文:https://www . geesforgeks . org/stack-equals-method-in-Java-with-example/
Java 中 Stack 类的Java . util . Stack . equals(Object obj)方法用于验证对象与堆栈的相等性并进行比较。只有当两个堆栈包含具有相同顺序的相同元素时，列表才返回 true。
语法:
first_Stack.equals(second_Stack)
参数:该方法接受一个强制参数 second_Stack ，该参数是指要与第一个 Stack 进行比较的第二个 Stack。
返回值:该方法返回真如果等式成立，并且对象和堆栈都相等，则返回假。
下面的程序用来说明 java.util.Stack.elements()方法的工作原理:
程序 1:
// Java code to illustrate the equals() method
import java.util.*;
public class Stack_Demo {
public static void main(String[] args)
{
// Creating an empty Stack
Stack<String> stack1 = new Stack<String>();
// Inserting elements into the table
stack1.add("Geeks");
stack1.add("4");
stack1.add("Geeks");
stack1.add("Welcomes");
stack1.add("You");
// Displaying the Stack
System.out.println("The Stack is: "
+ stack1);
// Creating an empty Stack
Stack<String> stack2 = new Stack<String>();
// Inserting elements into the table
stack2.add("Geeks");
stack2.add("4");
stack2.add("Geeks");
stack2.add("Welcomes");
stack2.add("You");
// Displaying the Stack
System.out.println("The Stack is: "
+ stack2);
System.out.println("Are both of them equal? "
+ stack1.equals(stack2));
}
}
Output:
The Stack is: [Geeks, 4, Geeks, Welcomes, You]
The Stack 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 Stack_Demo {
public static void main(String[] args)
{
// Creating an empty Stack
Stack<Integer> stack1 = new Stack<Integer>();
// Inserting elements into the table
stack1.add(10);
stack1.add(15);
stack1.add(20);
stack1.add(25);
stack1.add(30);
// Displaying the Stack
System.out.println("The Stack is: " + stack1);
// Creating an empty Stack
Stack<Integer> stack2 = new Stack<Integer>();
// Inserting elements into the table
stack2.add(10);
stack2.add(15);
stack2.add(20);
stack2.add(25);
stack2.add(30);
stack2.add(40);
// Displaying the Stack
System.out.println("The Stack is: " + stack2);
System.out.println("Are both of them equal? "
+ stack1.equals(stack2));
}
}
Output:
The Stack is: [10, 15, 20, 25, 30]
The Stack is: [10, 15, 20, 25, 30, 40]
Are both of them equal? false
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