How to enable the Java keyword assert in Eclipse program-wise?

Question

How can I enable the assert keyword in Eclipse?

public class A
{
    public static void main(String ... args)
    {
        System.out.println(1);
        assert false;
        System.out.println(2);
    }
}

Answer 1

To be specific:

• Go to Run->run configuration
• select java application in left nav pan.
• right click and select New.
• select Arguments tab
• Add -ea in VM arguments.

Answer 2

If anyone wants to enable assertions by default (in contrast to enabling them for just a single run configuration), it is possible with the following steps:

1. Window (menu bar)
2. Preferences
3. Java
4. Installed JREs
5. Select your JRE/JDK
6. Press Edit...
7. Default VM arguments
8. Add -ea

Answer 3

1. Form the menu bar, select Run -> Run Configurations....
2. Select Arguments tab.
3. Add -ea to VM arguments.
4. Click Apply.
5. Click Run.

Answer 4

Java introduced the assert keyword, so the way to enable source-level support is to make sure that Eclipse's Java compliance level is 1.4 or higher. (The chances are that the compliance level is already higher than that ...)

To cause a Java application launched from Eclipsed to run with assertion checking enabled, add the "-ea" argument to the VM arguments in the launcher configuration's "Arguments" tab.

Answer 5

You need to go to run configurations and add vm arguments as "-enableassertions" (or) "-ea"

After that when you run code with assert statement, you will see assert in action.

Answer 6

In case someone uses IDEA, -ea is enabled by default in some IDEA versions, but disabled in others. To manually configure it, it is under run -> edit configuration -> vm option