Java中的 CompoundName get() 方法及示例

javax.naming.CompoundName 类的get()方法用于获取此复合名称对象的组件。作为参数传递的位置，用于从复合名称对象中获取出现在该位置的组件。

句法：

public String get(int posn)

参数：此方法接受posn ，它是要检索的组件的从 0 开始的索引。必须在 [0, size()) 范围内。

返回值：此方法返回索引 posn 处的组件。

异常：如果 posn 超出指定范围，此方法将引发ArrayIndexOutOfBoundsException 。

下面的程序说明了 CompoundName.get() 方法：
方案一：

// Java program to demonstrate
// CompoundName.get()
  
import java.util.Properties;
import javax.naming.CompoundName;
import javax.naming.InvalidNameException;
  
public class GFG {
    public static void main(String[] args)
        throws InvalidNameException
    {
  
        // need properties for CompoundName
        Properties props = new Properties();
        props.put("jndi.syntax.separator", ":");
        props.put("jndi.syntax.direction",
                  "left_to_right");
  
        // create compound name object
        CompoundName CompoundName1
            = new CompoundName("a:b:z:y:x", props);
  
        // apply get()
        String pos1 = CompoundName1.get(0);
        String pos2 = CompoundName1.get(1);
  
        // print value
        System.out.println(pos1);
        System.out.println(pos2);
    }
}

输出：

a
b

方案二：

// Java program to demonstrate
// CompoundName.get() method
  
import java.util.Properties;
import javax.naming.CompoundName;
import javax.naming.InvalidNameException;
  
public class GFG {
    public static void main(String[] args)
        throws InvalidNameException
    {
  
        // need properties for CompoundName
        Properties props = new Properties();
        props.put("jndi.syntax.separator", "/");
        props.put("jndi.syntax.direction",
                  "left_to_right");
  
        // create compound name object
        CompoundName CompoundName1
            = new CompoundName(
                "c/e/d/v/a/b/z/y/x/f",
                props);
  
        // apply get()
        String pos3 = CompoundName1.get(3);
        String pos4 = CompoundName1.get(4);
  
        // print value
        System.out.println("position 3:"
                           + pos3);
        System.out.println("position 4:"
                           + pos4);
    }
}

输出：

position 3:v
position 4:a

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