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import org.apache.commons.lang.StringUtils;
public class Ideone{
 
     public static void main(String []args){
         String r = null;
         if(StringUtils.isEmpty() || "test".indexOf(r) == -1){
             System.out.println("test");
         }
     }
}
 

Main.java:2: error: class Ideone is public, should be declared in a file named Ideone.java
public class Ideone{
       ^
Main.java:1: error: package org.apache.commons.lang does not exist
import org.apache.commons.lang.StringUtils;
                              ^
Main.java:6: error: cannot find symbol
         if(StringUtils.isEmpty() || "test".indexOf(r) == -1){
            ^
  symbol:   variable StringUtils
  location: class Ideone
3 errors

Standard output is empty