To String (from int, char)

[Char to String]

String xStr = "Some text here";

char x = xStr.charAt(0);

[Int to String]

int x = 10;

String y = "" + x;

[Double to String]

double x = 10.12;

String y = "" + x;

[Double to Int]

double x = 10.51;

int y = (int) x;

System.out.println("x = " + x + ", y = " + y);