Java Stack setSize()用法及代码示例

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。

用法:

public void setSize(int size)

参数：此方法将新大小作为参数。

异常：如果新大小为负，则此方法将引发ArrayIndexOutOfBoundsException。

以下示例说明了setSize()方法。

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<Integer> 
            Stack<Integer> 
                stack = new Stack<Integer>(); 
  
            // 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<Integer> 
            Stack<String> 
                stack = new Stack<String>(); 
  
            // 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

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注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 Stack setSize() method in Java with Example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。