Java中的 CompositeName remove() 方法及示例

javax.naming.CompositeName 类的remove()方法用于从该复合名称中删除位于位置posn的组件。位置posn作为参数传递给此方法。此方法删除此复合名称对象在位置 'posn' 处的组件，并且在大于 'posn' 的位置处存在的组件向下移动 1。对象的大小减 1。

句法：

public Object remove(int posn)
       throws InvalidNameException

参数：此方法接受posn ，它是要删除的组件的索引。必须在 [0, size()) 范围内。

返回值：此方法返回已移除的组件（一个字符串）。

异常：此方法抛出ArrayIndexOutOfBoundsException如果 posn 超出指定范围（包括复合名称为空的情况）和 InvalidNameException 如果删除组件将违反复合名称的语法。

下面的程序说明了 CompositeName.remove() 方法：
方案一：

// Java program to demonstrate
// CompositeName.remove()
  
import java.util.Properties;
import javax.naming.CompositeName;
import javax.naming.InvalidNameException;
  
public class GFG {
    public static void main(String[] args)
        throws InvalidNameException
    {
  
        // create composite name object
        CompositeName CompositeName1
            = new CompositeName(
                "a/b/d/e/g/h/j/k/l");
  
        // apply remove()
        String removedComponent
            = (String)
                  CompositeName1.remove(5);
  
        // print value
        System.out.println(
            "Removed Component: "
            + removedComponent);
        System.out.println(
            "CompositeName After removal: "
            + CompositeName1);
    }
}

输出：

Removed Component: h
CompositeName After removal: a/b/d/e/g/j/k/l

方案二：

// Java program to demonstrate
// CompositeName.remove() method
  
import java.util.Properties;
import javax.naming.CompositeName;
import javax.naming.InvalidNameException;
  
public class GFG {
    public static void main(String[] args)
        throws InvalidNameException
    {
  
        // create composite name object
        CompositeName CompositeName1
            = new CompositeName(
                "aa/bb/cc/dd/ee/ff/gg/hh");
  
        // apply remove()
        String removedComponent1
            = (String)
                  CompositeName1.remove(1);
  
        // print value
        System.out.println("Removed Component: "
                           + removedComponent1);
        System.out.println("CompositeName After removal: "
                           + CompositeName1);
  
        // again remove component
        String removedComponent2
            = (String)
                  CompositeName1.remove(2);
  
        // print results
        System.out.println(
            "Removed Component: "
            + removedComponent2);
        System.out.println(
            "CompositeName After removal: "
            + CompositeName1);
    }
}

输出：

Removed Component: bb
CompositeName After removal: aa/cc/dd/ee/ff/gg/hh
Removed Component: dd
CompositeName After removal: aa/cc/ee/ff/gg/hh

参考资料：https://docs.oracle.com/javase/10/docs/api/javax/naming/CompositeName.html#remove(int)