Java 中的堆栈迭代器()方法，示例
原文:https://www . geesforgeks . org/stack-iterator-method-in-Java-with-example/
Java . util . Stack . iterator()方法用于返回一个与 Stack 元素相同的迭代器。元素从堆栈中随机返回。
语法:
Iterator *iterate_value* = Stack.iterator();
参数:函数不取任何参数。
返回值:方法迭代堆栈的元素并返回值(迭代器)。
下面的程序说明了 Java.util.Stack.iterator()方法的使用:
例 1:
// Java code to illustrate iterator()
import java.util.*;
import java.util.Stack;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<String> stack = new Stack<String>();
// Use add() method to add elements into the Stack
stack.add("Welcome");
stack.add("To");
stack.add("Geeks");
stack.add("4");
stack.add("Geeks");
// Displaying the Stack
System.out.println("Stack: " + stack);
// Creating an iterator
Iterator value = stack.iterator();
// Displaying the values
// after iterating through the stack
System.out.println("The iterator values are: ");
while (value.hasNext()) {
System.out.println(value.next());
}
}
}
Output:
Stack: [Welcome, To, Geeks, 4, Geeks]
The iterator values are:
Welcome
To
Geeks
4
Geeks
例 2:
// Java code to illustrate hashCode()
import java.util.*;
public class StackDemo {
public static void main(String args[])
{
// Creating an empty Stack
Stack<Integer> stack
= new Stack<Integer>();
// Use add() method
// to add elements into the Stack
stack.add(10);
stack.add(20);
stack.add(30);
stack.add(40);
stack.add(50);
// Displaying the Stack
System.out.println("Stack: " + stack);
// Creating an iterator
Iterator value = stack.iterator();
// Displaying the values
// after iterating through the stack
System.out.println("The iterator values are: ");
while (value.hasNext()) {
System.out.println(value.next());
}
}
}
Output:
Stack: [10, 20, 30, 40, 50]
The iterator values are:
10
20
30
40
50
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