import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaRDD;
import org.apache.spark.api.java.JavaSparkContext;

import java.util.Arrays;
import java.util.List;

/**
* take(n)
* 将RDD中的前多少数据返回过来，返回结果为数据形式
*
*/
public class TakeOperator {
public static void main(String[] args){
SparkConf conf = new SparkConf().setMaster("local").setAppName("take");
JavaSparkContext sc = new JavaSparkContext(conf);
List list = Arrays.asList("w1","w2","w3","w4","w5","w6");
JavaRDD listRdd = sc.parallelize(list);
List result = listRdd.take(3);
System.err.println(result.toString());
}
}

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