javax.naming.CompoundName类的isEmpty()方法用于检查此化合物名称对象是否为空。如果复合名称具有零个组成部分,则称该名称为空。
用法:
public boolean isEmpty()
参数:此方法不接受任何内容。
返回值:如果此化合物名称为空,则此方法返回true,否则返回false。
以下示例程序旨在说明CompoundName.isEmpty()方法:
程序1:
// Java program to demonstrate
// CompoundName.isEmpty()
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 isEmpty()
boolean isEmpty
= CompoundName1.isEmpty();
// print value
System.out.println("This Compound "
+ "object is empty:"
+ isEmpty);
}
}
输出:
This Compound object is empty:false
程序2:
// Java program to demonstrate
// CompoundName.isEmpty() 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(
"", props);
// apply isEmpty()
boolean isEmpty
= CompoundName1.isEmpty();
// print value
System.out.println("This Compound "
+ "object is empty:"
+ isEmpty);
}
}
输出:
This Compound object is empty:true
参考文献:https://docs.oracle.com/javase/10/docs/api/javax/naming/CompoundName.html#isEmpty()
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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 CompoundName isEmpty() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。