Java LongStream count()用法及代碼示例

// Java code for LongStream count() 
// to count the number of elements in 
// given stream 
import java.util.*; 
import java.util.stream.LongStream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream 
        LongStream stream = LongStream.of(2L, 3L, 4L, 5L, 
                                          6L, 7L, 8L); 
  
        // storing the count of elements 
        // in a variable named total 
        long total = stream.count(); 
  
        // displaying the total number of elements 
        System.out.println(total); 
    } 
}

// Java code for LongStream count() 
// to count the number of elements in 
// given range excluding the last element 
import java.util.*; 
import java.util.stream.LongStream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream 
        LongStream stream = LongStream.range(2, 50); 
  
        // storing the count of elements 
        // in a variable named total 
        long total = stream.count(); 
  
        // displaying the total number of elements 
        System.out.println(total); 
    } 
}

// Java code for LongStream count() 
// to count the number of distinct 
// elements in given stream 
import java.util.*; 
import java.util.stream.LongStream; 
  
class GFG { 
  
    // Driver code 
    public static void main(String[] args) 
    { 
        // creating a stream 
        LongStream stream = LongStream.of(2L, 3L, 4L, 4L, 
                                          7L, 7L, 8L); 
  
        // storing the count of distinct elements 
        // in a variable named total 
        long total = stream.distinct().count(); 
  
        // displaying the total number of elements 
        System.out.println(total); 
    } 
}