Indicate your preferences for the Build Path settings on the    Java > Build Path  preference page and its sub pages:
The options are:
| Option | Description | Default | 
|---|---|---|
| Source and output folder | 
 | Folders Source Folder: src Output Folder: bin | 
| As JRE library use | Select what kind of JRE library should be used for newly created Java projects. | JRE container |