Literals : Data Type Introduction « Data Type « Java Tutorial

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3. Data Type Introduction

public class MainClass {
  char c = 0xffff; // max char hex value

  byte b = 0x7f; // max byte hex value

  short s = 0x7fff; // max short hex value

  int i1 = 0x2f; // Hexadecimal (lowercase)

  int i2 = 0X2F; // Hexadecimal (uppercase)

  int i3 = 0177; // Octal (leading zero)

  // Hex and Oct also work with long.
  long n1 = 200L; // long suffix

  long n2 = 200l; // long suffix (but can be confusing)

  long n3 = 200;

  // ! long l6(200); // not allowed
  float f1 = 1;

  float f2 = 1F; // float suffix

  float f3 = 1f; // float suffix

  float f4 = 1e-45f; // 10 to the power

  float f5 = 1e+9f; // float suffix

  double d1 = 1d; // double suffix

  double d2 = 1D; // double suffix

  double d3 = 47e47d; // 10 to the power
}