Java StringTokenizer hasMoreElements()方法及实例

StringTokenizer类 的 hasMoreElements() 方法也检查这个StringTokenizer是否有更多的令牌可用。它与hasMoreTokens()类似。该方法的存在完全是为了使该类的枚举接口能够被实现。

语法

public boolean hasMoreElements()

参数： 该方法不接受任何参数。

返回值： 如果在当前位置之后的字符串中发现至少还有一个标记，该方法返回布尔值True，否则返回false。

下面的程序说明了StringTokenizer的hasMoreElements()方法的工作原理：
示例1 :

// Java code to illustrate hasMoreElements() method
  
import java.util.*;
  
public class StringTokenizer_Demo {
    public static void main(String args[])
    {
        // Creating a StringTokenizer
        StringTokenizer str_arr
            = new StringTokenizer(
                "Lets practice at GeeksforGeeks");
  
        // Counting the tokens
        System.out.println("The number of Tokens are: "
                           + str_arr.countTokens());
  
        // Checking for any tokens
        System.out.println(str_arr.hasMoreElements());
  
        // Checking and displaying the Tokens
        while (str_arr.hasMoreElements()) {
            System.out.println("The Next token: "
                               + str_arr.nextToken());
        }
    }
}

输出:

The number of Tokens are: 4
true
The Next token: Lets
The Next token: practice
The Next token: at
The Next token: GeeksforGeeks

例2 :

// Java code to illustrate hasMoreElements() method
  
import java.util.*;
  
public class StringTokenizer_Demo {
    public static void main(String args[])
    {
        // Creating a StringTokenizer
        StringTokenizer str_arr
            = new StringTokenizer("");
  
        // Counting the tokens
        System.out.println("The number of Tokens are: "
                           + str_arr.countTokens());
  
        // Checking for any tokens
        System.out.println(str_arr.hasMoreElements());
    }
}

输出: