Java中的 CompoundName startsWith() 方法和示例

javax.naming.CompoundName 类的startsWith()方法用于检查作为参数传递的复合名称是否是该复合名称的前缀。如果该复合名称对象以“X”结尾，则复合名称“X”是该复合名称的前缀。如果 X 为 null 或不是复合名称对象，则返回 false。

句法：

public boolean startsWith(Name n)

参数：此方法接受n ，它是要检查的可能为空的复合名称。

返回值：如果 n 是 CompoundName 并且是该复合名称的前缀，则此方法返回 true，否则返回 false。

下面的程序说明了 CompoundName.startsWith() 方法：
方案一：

// Java program to demonstrate
// CompoundName.startsWith()
  
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(
                "1:2:4:6", props);
        CompoundName CompoundName2
            = new CompoundName(
                "2:4:6", props);
  
        // apply startsWith()
        boolean Flag
            = CompoundName1
                  .startsWith(CompoundName2);
  
        // print value
        if (Flag)
            System.out.println(
                "CompoundName1 starts with "
                + " CompoundName2");
        else
            System.out.println(
                "CompoundName1 not starts with "
                + " CompoundName2");
    }
}

输出：

CompoundName1 not starts with  CompoundName2

方案二：

// Java program to demonstrate
// CompoundName.startsWith() 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);
        CompoundName CompoundName2
            = new CompoundName(
                "c/e/d",
                props);
  
        // apply startsWith()
        boolean Flag
            = CompoundName1
                  .startsWith(CompoundName2);
  
        // print value
        if (Flag)
            System.out.println(
                "CompoundName1 starts with "
                + " CompoundName2");
        else
            System.out.println(
                "CompoundName1 not starts with "
                + " CompoundName2");
    }
}

输出：

CompoundName1 starts with  CompoundName2

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