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Java CompositeName isEmpty()用法及代码示例


javax.naming.CompositeName类的isEmpty()方法用于检查此复合名称对象是否为空。如果复合名称包含零个组成部分,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:如果此复合名称为空,则此方法返回true,否则返回false。

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

// Java program to demonstrate 
// CompositeName.isEmpty() 
  
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/z/y/x"); 
  
        // apply isEmpty() 
        boolean isEmpty 
            = CompositeName1.isEmpty(); 
  
        // print value 
        System.out.println( 
            "This composite "
            + "object is empty:" + isEmpty); 
    } 
}
输出:
This composite object is empty:false

程序2:

// Java program to demonstrate 
// CompositeName.isEmpty() 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(""); 
  
        // apply isEmpty() 
        boolean isEmpty 
            = CompositeName1.isEmpty(); 
  
        // print value 
        System.out.println( 
            "This composite "
            + "object is empty:"
            + isEmpty); 
    } 
}
输出:
This composite object is empty:true

参考文献:https://docs.oracle.com/javase/10/docs/api/javax/naming/CompositeName.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 CompositeName 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。