JUnit: using constructor instead of @Before

Question

I\'m using JUnit 4. I can\'t see the difference between initializing in the constructor or using a dedicated init function annotated by @Before. Does this mean

Answer 1

There is no difference except that the constructor is the only method ehere can initialize the @Rule objects:

public class TestClass {

    @Rule
    public SomeRule rule;

    public TestClass() {
        // code to initialize the rule field
        conf = new RuleConf()
        rule = new SomeRule(conf)
    }
}