error: package com.google.common.base does not exist

Question

given the following code in java, when compiling it u have a lot of errors :

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Main.java:1: error: package com.google.common.base does not exist import com.google.common.base.Preconditions; ^

Main.java:2: error: package com.google.common.collect does not exist import com.google.common.collect.Lists; ^

Main.java:3: error: package org.ros.exception does not exist import org.ros.exception.RosRuntimeException; ^

Main.java:4: error: package org.ros.internal.loader does not exist import org.ros.internal.loader.CommandLineLoader; ^

Main.java:5: error: package org.ros.node does not exist import org.ros.node.DefaultNodeMainExecutor; ^

Main.java:6: error: package org.ros.node does not exist import org.ros.node.NodeConfiguration; ^

Main.java:7: error: package org.ros.node does not exist import org.ros.node.NodeMainExecutor;

I run it via IntelliJ. Does anyone know why it does not work?

import com.google.common.base.Preconditions; import com.google.common.collect.Lists; import org.ros.exception.RosRuntimeException; import org.ros.internal.loader.CommandLineLoader; import org.ros.node.DefaultNodeMainExecutor; import org.ros.node.NodeConfiguration; import org.ros.node.NodeMainExecutor;  // This class will run a publisher and subscriber, and relay data between them.  public class Main {  static private Talker pubNodeMain;  static private Listener subNodeMain;  public static void main(String[] argv) throws Exception {     // Set up the executor for both of the nodes     NodeMainExecutor nodeMainExecutor = DefaultNodeMainExecutor.newDefault();      // Load the publisher     String[] pubArgv = {"Talker"};     CommandLineLoader pubLoader = new CommandLineLoader(Lists.newArrayList(pubArgv));     String nodeClassName = pubLoader.getNodeClassName();     System.out.println("Loading node class: " + pubLoader.getNodeClassName());     NodeConfiguration pubNodeConfiguration = pubLoader.build();      try {         pubNodeMain = (Talker) pubLoader.loadClass(nodeClassName);     } catch (ClassNotFoundException e) {         throw new RosRuntimeException("Unable to locate node: " + nodeClassName, e);     } catch (InstantiationException e) {         throw new RosRuntimeException("Unable to instantiate node: " + nodeClassName, e);     } catch (IllegalAccessException e) {         throw new RosRuntimeException("Unable to instantiate node: " + nodeClassName, e);     }      Preconditions.checkState(pubNodeMain != null);     nodeMainExecutor.execute(pubNodeMain, pubNodeConfiguration);      // Load the subscriber     String[] subArgv = {"Listener"};     CommandLineLoader subLoader = new CommandLineLoader(Lists.newArrayList(subArgv));     nodeClassName = subLoader.getNodeClassName();     System.out.println("Loading node class: " + subLoader.getNodeClassName());     NodeConfiguration subNodeConfiguration = subLoader.build();      try {         subNodeMain = (Listener) subLoader.loadClass(nodeClassName);     } catch (ClassNotFoundException e) {         throw new RosRuntimeException("Unable to locate node: " + nodeClassName, e);     } catch (InstantiationException e) {         throw new RosRuntimeException("Unable to instantiate node: " + nodeClassName, e);     } catch (IllegalAccessException e) {         throw new RosRuntimeException("Unable to instantiate node: " + nodeClassName, e);     }      Preconditions.checkState(subNodeMain != null);     nodeMainExecutor.execute(subNodeMain, subNodeConfiguration);   }  } 

Answer 1

<dependency>   <groupId>com.google.guava</groupId>   <artifactId>guava</artifactId>   <version>11.0.2</version> </dependency> 

by adding dependency in pom.xml I was able to solve the problem

Answer 2

Add this dependency to your Gradle file

compile "com.google.guava:guava:16+"