Question

I’d like to convert integers from decimal base to quaternal base. What is the more concise way to do it ?

// From 4-base to decimal
int d = Integer.parseInt("10", 4); // 5

// From decimal to decimal string 
String b10 = String.valueOf(d);    // "5"

// From decimal to 4-base string ?
String b4 = yourMagicFunction(d, 4);  // "10"

Answer 1

Are you just looking for Integer.toString(int, int)?

String b4 = Integer.toString(5, 4); // b4 = "11"

(Note the 11 rather than 10… parsing “10” base 4 gives 4, not 5.)

It’s not clear what you’re looking for beyond Integer.parseInt(String, int) and Integer.toString(int, int)…