用示例在 Java 中编写 remove()方法

原文:https://www . geesforgeks . org/composite name-remove-method-in-Java-with-examples/

一个 javax.naming.CompositeName 类的 remove() 方法用于从该复合名称中移除位于 posn 位置的组件。位置 posn 作为参数传递给该方法。此方法移除位置为“posn”的复合名称对象的组件，并且位置大于“posn”的组件下移一位。对象的大小减少 1。

语法:

public Object remove(int posn)
       throws InvalidNameException

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

返回值:此方法返回移除的组件(字符串)。

异常:如果 posn 在指定范围之外(包括复合名称为空的情况)并且 InvalidNameException 如果删除组件会违反复合名称的语法，此方法将引发arrayindextofboundsexception。

下面的程序说明了 CompositeName.remove()方法: 程序 1:

// 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);
    }
}

Output:

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

程序 2:

// 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);
    }
}

Output:

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

参考文献:https://docs . Oracle . com/javase/10/docs/API/javax/naming/composite name . html # remove(int)

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