public class TestNumber {
    long longLiteral = 123_456_7;
    long longHexLiteral = 0xFF_EC_DE_5E;
    int intLiteral = 123_4;
    float floatLiteral = 123_4.f;
    double doubleLiteral = 123_4d;
    short shortLiteral = 1_2_3;
    byte byteLiteral = 1_2_3;
}