解决java.lang.ArrayindexOutOfBoundsException
有人能帮我解决这个错误吗解决java.lang.ArrayindexOutOfBoundsException,java,indexoutofboundsexception,Java,Indexoutofboundsexception,有人能帮我解决这个错误吗 package bigdata.tp1; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IntWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Job; import org.apache.hado
package bigdata.tp1;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.log4j.BasicConfigurator;
public class WordCount {
public static void main(String[] args) throws Exception {
BasicConfigurator.configure();
Configuration conf = new Configuration();
Path inputPath=new Path(args[0]);
Path outputPath=new Path(args[1]);// ligne 16
Job job = Job.getInstance(conf, "wordcount");
job.setJarByClass(WordCount.class);
job.setMapperClass(MyMapper.class);
job.setCombinerClass(MyReducer.class);
job.setReducerClass(MyReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
FileInputFormat.addInputPath(job, inputPath);
FileOutputFormat.setOutputPath(job,outputPath);
if (!job.waitForCompletion(true))
return;
}
}
线程“main”java.lang.ArrayIndexOutOfBoundsException中的异常:
索引1超出长度为1的范围
main(WordCount.java:16)
看起来您正试图访问第二个comandline参数,但只提供了一个参数。
在访问这些参数之前,请检查参数计数。如果需要两个程序参数,则需要先检查它们
public static void main(String[] args) throws Exception {
if(args.length != 2){
throw new IllegalArgumentException("Exact 2 arguments needed");
}
//your code here
}
我忘了在程序的参数中添加第二个参数,即:src/main/resources/output。
所以在运行->编辑设置下。。。→ + → 应用程序)我必须在程序参数下添加src/main/resources/output是的,我忘了在程序参数中添加第二个参数,即:src/main/resources/output谢谢