Java中的向量subList()方法
Java.util.Vector.subList()用于返回参数中提到的范围内现有 Vector 的子列表。该方法接受一个上限和一个下限,并返回范围内提到的所有元素。如果元素存在于列表中,则包括下限并且排除上限。基本上,它需要子列表大于等于下限并且严格小于上限元素。
句法:
Vector.subList(int low_index, int up_index)
参数:该方法接受 2 个强制参数:
- low_index:这是整数类型,定义了评估子列表的起始元素的下限或索引。该元素包含在子列表中。
- up_index:这是整数类型,定义了对子列表进行评估的结束元素的上限或索引。此元素从子列表中排除。
返回值:该方法返回给定参数范围内提到的 Vector 类型的子列表。
示例 1:
Java
// Java Program to illustrate subList() method
// of Vector class
// Importing required class
import java.util.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating an empty Vector by declaring
// object of Vector class of Integer type
Vector vec_tor = new Vector();
// Adding custom input elements
// using add() method
vec_tor.add(5);
vec_tor.add(1);
vec_tor.add(50);
vec_tor.add(10);
vec_tor.add(20);
vec_tor.add(6);
vec_tor.add(20);
vec_tor.add(18);
vec_tor.add(9);
vec_tor.add(30);
// Print and display all elements present in vector
System.out.println("The Vector is: " + vec_tor);
// Creating the sublist vector
List sub_list = new ArrayList();
// Limiting the values till 5
// using subList() method via passing arguments
sub_list = vec_tor.subList(2, 5);
// Displaying the elements present inside list
System.out.println("The resultant values "
+ "within the sub list: "
+ sub_list);
}
}
Java
// Java Program to illustrate subList() method
// of Vector class
// Importing required class
import java.util.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating an empty Vector by
// creating string object of Vector class
Vector vec_tor = new Vector();
// Adding custom input elements to above vector
// object using add() method
vec_tor.add("Welcome");
vec_tor.add("To");
vec_tor.add("Geek");
vec_tor.add("For");
vec_tor.add("Geeks");
// Display message only
System.out.println("The Vector is: " + vec_tor);
// Creating the sublist vector
List sub_list = new ArrayList();
// Limiting the values till 5
// using subList() method
sub_list = vec_tor.subList(1, 5);
// Display elements of List object
System.out.println("The resultant values "
+ "within the sub list: "
+ sub_list);
}
}
输出:
The Vector is: [5, 1, 50, 10, 20, 6, 20, 18, 9, 30]
The resultant values within the sub list: [50, 10, 20]
示例 2:
Java
// Java Program to illustrate subList() method
// of Vector class
// Importing required class
import java.util.*;
// Main class
public class GFG {
// Main driver method
public static void main(String[] args)
{
// Creating an empty Vector by
// creating string object of Vector class
Vector vec_tor = new Vector();
// Adding custom input elements to above vector
// object using add() method
vec_tor.add("Welcome");
vec_tor.add("To");
vec_tor.add("Geek");
vec_tor.add("For");
vec_tor.add("Geeks");
// Display message only
System.out.println("The Vector is: " + vec_tor);
// Creating the sublist vector
List sub_list = new ArrayList();
// Limiting the values till 5
// using subList() method
sub_list = vec_tor.subList(1, 5);
// Display elements of List object
System.out.println("The resultant values "
+ "within the sub list: "
+ sub_list);
}
}
输出
The Vector is: [Welcome, To, Geek, For, Geeks]
The resultant values within the sub list: [To, Geek, For, Geeks]