Integer.toString(int i) vs String.valueOf(int i) in Java

In String type we have several method valueOf static String valueOf(boolean b) static String valueOf(char c) static String valueOf(char[] data) static String valueOf(char[] data, int offset, int count) static String valueOf(double d) static String valueOf(float f) static String valueOf(int i) static String valueOf(long l) static String valueOf(Object obj) As we can see those method are … Read more

How to clear the console using Java?

Since there are several answers here showing non-working code for Windows, here is a clarification: Runtime.getRuntime().exec(“cls”); This command does not work, for two reasons: There is no executable named cls.exe or in a standard Windows installation that could be invoked via Runtime.exec, as the well-known command cls is builtin to Windows’ command line interpreter. … Read more

Why don’t Java’s +=, -=, *=, /= compound assignment operators require casting long to int?

As always with these questions, the JLS holds the answer. In this case §15.26.2 Compound Assignment Operators. An extract: A compound assignment expression of the form E1 op= E2 is equivalent to E1 = (T)((E1) op (E2)), where T is the type of E1, except that E1 is evaluated only once. An example cited from §15.26.2 […] the following code is … Read more