Set the source program to view Java

1. Point "Window", "Preferences", "Java", "Installed JREs"

2. The right side of "Installed JREs" is the list pane, listing the JRE environment in the system, selecting your JRE, and then clicking "Edit ..." on the edge, a window will appear (edit JRE)

3. Select this entry for the Rt.jar file: "C:\Program Files\java\jre_1.5.0_06\lib\rt.jar"
Point to the left of the "+" sign to expand it,

4. After expanding, you can see "source Attachment: (None)", point this item, point to the right button "Source Attachment ...", select the "src.zip" file under your JDK directory (the file is under the root directory of the JDK installation directory)

5. "OK", Setup complete

When the settings are complete, you can see the source code of the method by holding down the CTRL key and clicking a JDK method name or class name with the mouse. Also can be achieved by F3.

Set the source program to view Java