# Using content assist

In this section you will use content assist to finish writing a new method. Open junit.samples.VectorTest.java file in the Java editor if you do not already have it open and select the `testSizeIsThree()` method in the Outline view. If the file doesn't contain such a method see Adding new methods for instructions on how to add this method.

1. Add the following lines to the end of the method:

   `Vector v = new Vector();
   for (int i=0; i<3; i++)
   v.addElement(new Object());
   assert
   `

2. With your cursor at the end of the word `assert`, press `Ctrl`+`Space` to activate content assist. The content assist window with a list of proposals will appear. Scroll the list to see the available choices.

3. With the content assist window still active, type the letter 't' in the source code after `assert` (with no space in between). The list is narrowed and only shows entries starting with 'assertt'. Select and then hover over various items in the list to view any available Javadoc help for each item.

4. Select `assertTrue(boolean)` from the list and press `Enter`. The code for the `assertTrue(boolean)` method is inserted.
5. Complete the line so that it reads as follows:

   `assertTrue(v.size() == fFull.size());`

6. Save the file.

Java editor

Using the Java editor
Using content assist

Java Content Assist
Java Editor Preferences