A red exclamation point in front of the Java project icon and a java project icon

A red exclamation point in front of the Java project icon and a java project icon

Sometimes there is a red exclamation mark in front of the Java project icon, because the jar package introduced by the project does not exist (or is deleted or moved.

Right-click the project and choose Build Path> Configure Build Path. In the displayed window, you can see that the jar package with a Red Cross is a jar package that does not exist.

The solution is to select the file, and then click the Edit button on the right to re-select the correct path for the file. After confirmation, the Red Cross in front of the jar package does not exist, the exclamation point before the project disappears.

What is the problem with the red exclamation mark on the icon when a Java project is created? The prompt is as follows:

In java engineering view, we usually choose no, and remember to decide

How can I solve the problem with a red exclamation mark before a java import project?

Just add the database driver. I will help you with qq.