java setsize_Java Vector setSize（）方法与示例

淡淡的烟草味﹌ 2023-03-05 13:24 10阅读 0赞

java setsize

## 向量类setSize()方法 **(**Vector Class setSize() method**)** ##

*  **setSize() method** is available in java.util package.
    
    **setSize()方法**在java.util包中可用。
 *  **setSize() method** is used to set the new size of this vector and when new size (n\_size) > current size then extended size will be set to null initially.
    
    **setSize()方法**用于设置此向量的新大小，并且当新大小(n\_size)>当前大小时，扩展大小最初将设置为null。
 *  **setSize() method** is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
    
    **setSize()方法**是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
 *  **setSize() method** may throw an exception at the time of setting the size of this Vector.
    
    **setSize()方法**在设置此Vector的大小时可能会引发异常。
    
    **ArrayIndexOutOfBoundsException**: This exception may throw when the given parameter is not in a range.
    
    **ArrayIndexOutOfBoundsException** ：如果给定参数不在范围内，则可能引发此异常。

**Syntax:**

**句法：**

public void setSize(int n_size);

**Parameter(s):**

**参数：**

*  int n\_size – represents the new size to be set for this Vector.
    
    int n\_size –表示要为此Vector设置的新大小。

**Return value:**

**返回值：**

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of void setSize(int n_size) method 
    // of Vector 
    
    import java.util.*;
    
    public class SetSizeOfVector {
        
     public static void main(String[] args) {
        
      // Instantiates a Vector object  with
      // initial capacity of "10"
      Vector < String > v = new Vector < String > (10);
    
      // By using add() method is to add the
      // elements in this v
      v.add("C");
      v.add("C++");
      v.add("JAVA");
    
      // Display Vector
      System.out.println("v: " + v.size());
    
      // By using setSize() method is to
      // set the new size of this vector
      v.setSize(20);
    
      // Display updated size
      System.out.println("v.setSize(20): " + v.size());
     }
    }

**Output**

**输出量**

v: 3
    v.setSize(20): 20

> 翻译自: [https://www.includehelp.com/java/vector-setsize-method-with-example.aspx][https_www.includehelp.com_java_vector-setsize-method-with-example.aspx]

java setsize

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