Removing warning messages on IntelliJ IDEA while building Java project

I am using IntelliJ IDEA Community Edition for the first time and using Maven to set up a TDD environment. The code that I am trying to test and the warning messages I had encountered along with the project structure are provided below.

Project Structure:

Code:

package miscellaneous;

import org.junit.Test;

import static org.junit.Assert.*;

public class TestHello {

    // Methods to be tested.....
    private int Add1Plus1(int i, int j) {
        return (i + j);
    }

    @Test
    public void testAdd1Plus1() throws Exception {
        assertEquals(2, Add1Plus1(1, 1));
    }
}

Configuration details:

• Java compiler: 1.8.0_45
• Maven Version: 3.0.5
• Path to Maven user-settings file: /home/sandeep/Desktop/MyDocs/repos/git-repos/public/MavenCodeBase/settings.xml
• Path to Maven local repository: /home/sandeep/Desktop/MyDocs/repos/maven-repos
• pom.xml: http://pastebin.com/462Uytad

Warning messages:

Warning:java: source value 1.5 is obsolete and will be removed in a future release
Warning:java: target value 1.5 is obsolete and will be removed in a future release
Warning:java: To suppress warnings about obsolete options, use -Xlint:-options.

Question:

What is causing these messages and what would be a good/recommended way to fix these warning messages?

Check java version in your pom.xml(here you can find how to do it). Also check java version in Project Structure. And the last what you can do - check compiler version e.g.

I did all of the above and still had one instance of the warning:

Warning:java: source value 1.5 is obsolete and will be removed in a future release

I went into my project_name.iml file and replaced the following tag:

<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5" inherit-compiler-output="false">

with:

<component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">

And voila, no more error message. Hope this helps someone.

If the project with Maven, check pom.xml file for source and target:

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>3.6.1</version>
      <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <encoding>${project.build.sourceEncoding}</encoding>
      </configuration>
    </plugin>
  </plugins>
</build>

And in case of Gradle - check build.gradle for:

plugins {
    id 'java'
}
sourceCompatibility = 1.8

In my case none of the above solution worked. But changing language level in project structure did.

File -> Project Structure -> Project Settings -> Modules -> under "sources" tab change language level to some upper version.

If you have Maven project, open pom.xml file and add following code inside your project root:

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <configuration>
        <source>1.8</source>
        <target>1.8</target>
      </configuration>
    </plugin>
  </plugins>
</build>

I had this issue in Gradle project of Java.

In build.gradle file, there was a warning that the assignment was not used. I removed the sourceCompatibility = 1.5 line in build.gradle file and all the warning messages disappeared.

The real reason is that, your module target jdk version is not same with the IDE. One move to solve this problem: Preferences->Build,Execution,Deployment->Compiler->Java Compiler->Javac Options: uncheck Use compiler from module target JDK when possible Also, others answer about the pom is correct too.

<?xml version="1.0" encoding="UTF-8"?>
<project>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
</project>

OR

<project>
...
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>