Java中的Stack removeElementAt()方法示例
Java.util.Stack.removeElementAt(int index)方法用于从特定位置或索引处将元素从堆栈中移除。在此过程中,堆栈的大小会自动减少一,所有在移除元素后的其他元素都会向下移动一个位置。
语法:
Stack.removeElementAt(int index)
参数: 该方法接受一个整数数据类型的强制参数索引,该参数指定要从堆栈中删除的元素的位置。
返回值: 该方法具有 void 返回类型。这意味着它不返回任何内容。
以下程序说明了Java.util.Stack.remove(int index)方法:
示例1:
// Java code to illustrate removeElementAt()
import java.util.*;
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");
// Output the Stack
System.out.println("Stack: " + stack);
// Initial size
System.out.println("The initial size is: "
+ stack.size());
// Remove the element at 3rd position
stack.removeElementAt(2);
// Print the final Stack
System.out.println("Final Stack: " + stack);
// Final size
System.out.println("The final size is: "
+ stack.size());
}
}
Stack: [Geeks, for, Geeks, 10, 20]
The initial size is: 5
Final Stack: [Geeks, for, 10, 20]
The final size is: 4
示例2:
// Java code to illustrate removeElement() when position of
// element is passed as parameter
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 in the Stack
stack.add(10);
stack.add(20);
stack.add(30);
stack.add(40);
stack.add(50);
// Output the Stack
System.out.println("Stack: " + stack);
// Initial size
System.out.println("The initial size is: "
+ stack.size());
// Remove the element at 1st position
stack.removeElementAt(0);
// Print the final Stack
System.out.println("Final Stack: " + stack);
// Final size
System.out.println("The final size is: "
+ stack.size);
}
}
Stack: [10, 20, 30, 40, 50]
The initial size is: 5
Final Stack: [20, 30, 40, 50]
The final size is: 4