About Eclipse New Project solution for red exclamation point--dns_sd.jar Red Cross number problem

A red exclamation mark appears on the project after new JAVA project comes across a small problem.

Share the solution.

1. Project Right-click →build path→configure Build Path

2. In the Open Properties for Sortdemo window, click Libraries to locate the problematic jar package

3. Notice that there is a red fork on the Dns_sd.jar, followed by a hint (missed) in parentheses. Must not know what the problem caused Dns_sd.jar lost

4. In http://www.java2s.com/Code/Jar/d/Downloaddnssdjar.htm this website search dns_sd.jar and download, put the Jar file in your Java path, my path is D:\Program Files\java\jre8\lib\ext

5. Return to eclipse and refresh the project OK

About Eclipse New Project solution for red exclamation point--dns_sd.jar Red Cross number problem