Java CompositeName startsWith()用法及代碼示例

javax.naming.CompositeName類的startsWith()方法用於檢查作為參數傳遞的複合名稱是否為此複合名稱的前綴。如果此複合名稱對象以“ X”結尾，則複合名稱“ X”是該複合名稱的前綴。如果X為null或不是複合名稱對象，則返回false。

用法:

public boolean startsWith(Name n)

參數：此方法接受Name對象n，該對象可能是要檢查的複合名稱。

返回值：如果n是CompositeName且是此複合名稱的前綴，則此方法返回true，否則返回false。

下麵的程序說明CompositeName.startsWith()方法：
程序1:

// Java program to demonstrate 
// CompositeName.startsWith() 
  
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("1:2:4:6"); 
        CompositeName CompositeName2 
            = new CompositeName("2:4:6"); 
  
        // apply startsWith() 
        boolean Flag 
            = CompositeName1 
                  .startsWith(CompositeName2); 
  
        // print value 
        if (Flag) 
            System.out.println( 
                "CompositeName1 starts with "
                + " CompositeName2"); 
        else
            System.out.println( 
                "CompositeName1 not starts with "
                + " CompositeName2"); 
    } 
}

輸出：

CompositeName1 not starts with  CompositeName2

程序2:

// Java program to demonstrate 
// CompositeName.startsWith() 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( 
                "ca/eaaa/daaa/vaaa/a/b/z/y/x/f"); 
        CompositeName CompositeName2 
            = new CompositeName( 
                "ca/eaaa/daaa"); 
  
        // apply startsWith() 
        boolean Flag 
            = CompositeName1 
                  .startsWith(CompositeName2); 
  
        // print value 
        if (Flag) 
            System.out.println( 
                "CompositeName1 starts with "
                + " CompositeName2"); 
        else
            System.out.println( 
                "CompositeName1 not starts with "
                + " CompositeName2"); 
    } 
}

輸出：

CompositeName1 starts with  CompositeName2

參考文獻：https://docs.oracle.com/javase/10/docs/api/javax/naming/CompositeName.html#startsWith(javax.naming.Name)

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