Java Piscine:

You will need to compile your code if you intend to test it:

javac *.java -d build 

Then run the following command :

java -cp build ExerciseRunner

With method overloading, multiple methods can have the same name with different parameters:

    int myMethod(int x)
    float myMethod(float x)
    double myMethod(double x, double y)

str.length()
str.contains(subStr)
str.concat(str2)
str.replace(target, replacement)
str.indexOf()
str.lastIndexOf()
str.subString()
str.equals()

=>> Redirect the standard output (System.out) to a memory buffer.

    PrintStream printStream = new PrintStream(outputStream);
    System.setOut(printStream);