Java Vector removeRange()用法及代码示例

Java中Vector的removeRange()方法用于从Vector对象中删除指定范围内的所有元素。它将所有后续元素向左移动。此调用通过(toIndex-fromIndex)元素来缩短Vector，其中toIndex是结束索引，fromIndex是将删除所有元素的开始索引。 (如果toIndex == fromIndex，则此操作无效)

用法:

removeRange(int fromIndex, int toIndex)

参数：有两个参数：

fromIndex:从中删除索引元素的起始索引。
toIndex:范围[fromIndex-toIndex)之内，所有元素均被删除。

返回值：此方法不返回任何值。它仅删除指定范围内的所有元素。

异常：如果fromIndex或toIndex超出范围，则此方法将引发IndexOutOfBoundsException(fromIndex = size()或toIndex> size()或toIndex

示例1:：

// Java program to understand 
// about vector.removeRange() function 
  
mport java.util.*; 
  
// sice vector removeRange() method is protected 
// Therefore Vector is inherited 
public class GFG extends Vector<String> { 
  
    // main method 
    public static void main(String[] args) 
    { 
        // creating GFG object 
        GFG v = new GFG(); 
  
        // inserting elements into the vector 
        v.add("Geeks"); 
        v.add("for"); 
        v.add("Geeks"); 
        v.add("Ankit"); 
        v.add("Mishra"); 
        v.add("MNNIT"); 
  
        // printing vector before deleting 
        System.out.println("Vector before calling"
                           + " removeRange(): " + v); 
  
        // calling removeRange() function 
  
        v.removeRange(1, 3); 
        // printing after removeRange() called 
  
        System.out.println("Vector after calling"
                           + " removeRange(1, 3): " + v); 
    } 
}

//sice向量removeRange()方法受保护
//因此，Vector是继承的
输出：

Vector before calling removeRange(): [Geeks, for, Geeks, Ankit, Mishra, MNNIT]
Vector after calling removeRange(1, 3): [Geeks, Ankit, Mishra, MNNIT]

示例2:：

// Java program to understand 
// about vector.removeRange() function 
  
import java.util.*; 
  
// sice vector removeRange() method is protected 
// Therefore Vector is inherited 
public class GFG extends Vector<String> { 
  
    // main method 
    public static void main(String[] args) 
    { 
        // creating GFG object 
        GFG v = new GFG(); 
  
        // inserting elements into the vector 
        v.add("Geeks"); 
        v.add("for"); 
        v.add("Geeks"); 
        v.add("Ankit"); 
        v.add("Mishra"); 
        v.add("MNNIT"); 
  
        // printing vector before deleting 
        System.out.println("Vector before calling "
                           + "removeRange(): "
                           + v); 
  
        // calling removeRange() function 
  
        try { 
            // It will generate Runtime Error 
            v.removeRange(1, 16); 
            // printing after removeRange() called 
  
            System.out.println("Vector after "
                               + "calling removeRange(1, 3): "
                               + v); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

Vector before calling removeRange(): [Geeks, for, Geeks, Ankit, Mishra, MNNIT]
java.lang.ArrayIndexOutOfBoundsException

注意：强烈建议，如果我们想在任何类中调用removeRange()方法，则该类必须直接或间接扩展Vector类，否则会得到编译错误：方法removeRange()具有受保护的访问。

相关用法

注：本文由纯净天空筛选整理自ankit15697大神的英文原创作品 Vector removeRange() 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。