Use equals() if you want case sensitive match meaning it will look at case of string as well when matching. If you want case insensitive matching you can use equalsIgnoreCase() method in place of equals() I have to write an unit test in java, and was wondering what is the difference between .isEqualTo and .equals. Here is an example of my code: mockLog.message(0).header(SOURCE_HEADER).isEqualTo("String"); In general, both equals () and “==” operators in Java are used to compare objects to check equality, but here are some of the differences between the two: The main difference between the .equals () method and == operator is that one is a method, and the other is the operator. We can use == operators for reference comparison ( address And if you add an abstact method like @Test public void testEqualsReflexive(); this already begins to look like a testing framework. Now, each test class that plugs the interface will have to implement the test method. Moreover, using generic types (e.g. EqualsContractTester) will allow to avoid to have Object args in methods, but this is Also, two array references are considered equal if both are null. Arrays class in java provide the method Arrays.equals () to check whether two arrays are equal or not. Syntax : public static boolean equals (int [] a, int [] a2) Parameters : a - one array to be tested for equality a2 - the other array to be tested for equality Returns : true if A simple way is to run a loop and compare elements one by one. Java provides a direct method Arrays.equals () to compare two arrays. Actually, there is a list of equals () methods in the Arrays class for different primitive types (int, char, ..etc) and one for Object type (which is the base of all classes in Java). Parameter. obj - it is the reference object.. Returns. It returns true if this object is same as the obj argument else it returns false otherwise. Example 1 A Java Object class has the equals() and hashCode() methods defined. Since all classes in Java inherit from the Object class, they have the default implementation of the methods as well. The equals() method is meant to assert the equality of two objects, and the default implementation implies that if two objects are of the same identity, they 8Vl5cJ.