Java null String equals result
equals, java, null, string
Solution
You cannot use the dereference (dot, '.') operator to access instance variables or call methods on an instance if that instance is `null`. Doing so will yield a `NullPointerException`.
It is common practice to use something you know to be non-null for string comparison. For example, `"something".equals(stringThatMayBeNull)`.
Problem
Please help me how does the string.equals in java work with null value? Is there some problem with exceptions? Three cases: ``` boolean result1,result2, result3; //1st case String string1 = null; String string2 = null; result = string1.equals(string2); //2nd case String string1 = "something"; String string2 = null; result2 = string1.equals(string2); //3rd case String string1 = null; String string2 = "something"; result3 = string1.equals(string2); ``` What the values of results are? I expect this values: result1 is true; result2 is false; result3 is false;