Java中的堆栈setSize（）方法与示例

Java.util.Stack类的setSize()方法将此 Stack 实例的大小更改为作为参数传递的大小。

句法：

public void setSize(int size)

参数：此方法将新尺寸作为参数。

异常：如果新大小为负，此方法将抛出ArrayIndexOutOfBoundsException 。

下面是说明setSize()方法的示例。

示例 1：

// Java program to demonstrate
// setSize() method for Integer value
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
    {
  
        try {
  
            // Creating object of Stack
            Stack
                stack = new Stack();
  
            // adding element to stack
            stack.add(10);
            stack.add(20);
            stack.add(30);
            stack.add(40);
  
            // Print the Stack
            System.out.println("Stack: " + stack);
  
            // Print the current size of Stack
            System.out.println("Current size of Stack: "
                               + stack.size());
  
            // Change the size to 10
            stack.setSize(10);
  
            // Print the current size of Stack
            System.out.println("New size of Stack: "
                               + stack.size());
        }
  
        catch (Exception e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

Stack: [10, 20, 30, 40]
Current size of Stack: 4
New size of Stack: 10

示例 2：

// Java program to demonstrate
// setSize() method for String value
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
    {
  
        try {
  
            // Creating object of Stack
            Stack
                stack = new Stack();
  
            // adding element to stack
            stack.add("A");
            stack.add("B");
            stack.add("C");
            stack.add("D");
  
            // Print the Stack
            System.out.println("Stack: "
                               + stack);
  
            // Print the current size of Stack
            System.out.println("Current size of Stack: "
                               + stack.size());
  
            // Change the size to -1
            stack.setSize(-1);
  
            // Print the current size of Stack
            System.out.println("New size of Stack: "
                               + stack.size());
        }
  
        catch (Exception e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

Stack: [A, B, C, D]
Current size of Stack: 4
Exception thrown : java.lang.ArrayIndexOutOfBoundsException: -1