Java 中的堆栈元素 At()方法，示例
原文:https://www . geesforgeks . org/stack-element at-in-Java-method-with-example/
Java . util . Stack . elementat(int pos)方法用于从堆栈中获取或检索特定索引处的元素。
语法:
Stack.elementAt(int pos)
参数:该方法接受整数数据类型的强制参数位置，指定要从堆栈中提取的元素的位置或索引。
返回值:该方法返回出现在参数位置指定位置的元素。
下面的程序说明了 Java.util.Stack.get()方法:
程序 1:
// Java code to illustrate elementAt() method
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 in the Stack
stack.add("Geeks");
stack.add("for");
stack.add("Geeks");
stack.add("10");
stack.add("20");
// Displaying the Stack
System.out.println("Stack: "
+ stack);
// Fetching the specific element from the Stack
System.out.println("The element is: "
+ stack.elementAt(3));
}
}
Output:
Stack: [Geeks, for, Geeks, 10, 20]
The element is: 10
程序 2:
// Java code to illustrate elementAt() method
import java.util.Stack;
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 in the Stack
stack.add(1);
stack.add(2);
stack.add(3);
stack.add(4);
stack.add(5);
// Displaying the Stack
System.out.println("Stack: " + stack);
// Fetching the specific element from the Stack
System.out.println("The element is: "
+ stack.elementAt(1));
}
}
Output:
Stack: [1, 2, 3, 4, 5]
The element is: 2
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