Long class
限制int为64位Long
- Inheritance
-
- Object
- Comparable<
Long> - Number<
Long> - AbstractInt<
Long> - Long
Properties
- bitLength → int
-
Returns the minimum number of bits required to store this integer.
no setterinherited
- bits → int
-
返回bit位数
no setteroverride
- hashCode → int
-
The hash code for this object.
no setterinherited
- isEven → bool
-
Returns true if and only if this integer is even.
no setterinherited
- isOdd → bool
-
Returns true if and only if this integer is odd.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- sign → int
-
Returns the sign of this integer.
no setterinherited
- value → int
-
实际值
no setteroverride
Methods
-
abs(
) → Long -
Returns the absolute value of this integer.
inherited
-
byteValue(
) → Byte -
以byte形式返回指定数字的值
inherited
-
ceil(
) → Long -
Returns
this.inherited -
ceilToDouble(
) → double -
Returns
this.toDouble().inherited -
compareTo(
Long other) → int -
Compares this object to another object.
inherited
-
doubleValue(
) → double -
以double形式返回指定数字的值
inherited
-
floor(
) → Long -
Returns
this.inherited -
floorToDouble(
) → double -
Returns
this.toDouble().inherited -
gcd(
int other) → Long -
Returns the greatest common divisor of this integer and
other.inherited -
intValue(
) → Integer -
以int形式返回指定数字的值
inherited
-
longValue(
) → Long -
以long形式返回指定数字的值
inherited
-
modInverse(
int modulus) → Long -
Returns the modular multiplicative inverse of this integer
modulo
modulus.inherited -
modPow(
int exponent, int modulus) → Long -
Returns this integer to the power of
exponentmodulomodulus.inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
round(
) → Long -
Returns
this.inherited -
roundToDouble(
) → double -
Returns
this.toDouble().inherited -
shortValue(
) → Short -
以short形式返回指定数字的值
inherited
-
toRadixString(
int radix) → String -
Converts this to a string representation in the given
radix.inherited -
toSigned(
int width) → int -
Returns the least significant
widthbits of this integer, extending the highest retained bit to the sign. This is the same as truncating the value to fit inwidthbits using an signed 2-s complement representation. The returned value has the same bit value in all positions higher thanwidth.inherited -
toString(
) → String -
Returns a string representation of this integer.
inherited
-
toUnsigned(
int width) → int -
Returns the least significant
widthbits of this integer as a non-negative number (i.e. unsigned representation). The returned value has zeros in all bit positions higher thanwidth.inherited -
truncate(
) → Long -
Returns
this.inherited -
truncateToDouble(
) → double -
Returns
this.toDouble().inherited -
uByteValue(
) → int -
以无符号byte形式返回指定数字的值
inherited
-
uIntValue(
) → int -
以无符号int形式返回指定数字的值
inherited
-
uLongValue(
) → int -
以无符号long形式返回指定数字的值
inherited
-
uShortValue(
) → int -
以无符号short形式返回指定数字的值
inherited
-
valueOf(
int num) → Long -
创建实例
override
Operators
-
operator %(
dynamic other) → Long -
取模
inherited
-
operator &(
dynamic other) → Long -
位和运算符。
将this和
other都视为足够大的二进制分量整数，结果是一个数字，其中只有在this和other中设置的位集 如果两个操作数都为负，则结果为负，否则结果为非负inherited -
operator *(
dynamic other) → Long -
乘法，结果超出bits时，将溢出范围，具体参考toSigned
inherited
-
operator +(
dynamic other) → Long -
加法，结果超出bits时，将溢出范围，具体参考toSigned
inherited
-
operator -(
dynamic other) → Long -
减法
inherited
-
operator /(
dynamic other) → double -
除法
inherited
-
operator <(
dynamic other) → bool -
小于
inherited
-
operator <<(
dynamic other) → Long -
将此整数的位向左
shiftAmount。 向左移动会使数字变大，有效地将数字乘以pow(2, shiftIndex) 。 结果的大小没有限制。通过使用带有合适掩码的“and”运算符来限制中间值可能是相关的。 如果shiftAmount为负数，则为错误 结果超出bits时，将溢出范围，具体参考toSignedinherited -
operator <=(
dynamic other) → bool -
小于等于
inherited
-
operator ==(
Object other) → bool -
相等
inherited
-
operator >(
dynamic other) → bool -
大于
inherited
-
operator >=(
dynamic other) → bool -
大于等于
inherited
-
operator >>(
dynamic other) → Long -
将此整数的位向右
shiftAmount。 向右移动会使数字变小并丢弃最低有效位，从而有效地进行pow(2, shiftIndex)的整数除法。 如果shiftAmount为负数，则为错误inherited -
operator >>>(
dynamic other) → Long -
按位无符号右移
shiftAmount位。 最不重要的shiftAmount位被删除，其余位（如果有）被向下移动，并且零位被移入作为新的最高有效位。shiftAmount必须为非负数inherited -
operator ^(
dynamic other) → Long -
按位异或运算符。
将this和
other都视为足够大的二进制分量整数，结果是一个数字，其位集设置在this和other的一个中，但不是同时设置 如果操作数的符号相同，则结果为非负数，否则结果为负数inherited -
operator unary-(
) → Long -
负数
inherited
-
operator |(
dynamic other) → Long -
按位或运算符。
将this和
other都视为足够大的二进制分量整数，结果是一个数字，其位集在this和other中的任何一个中设置 如果两个操作数都是非负数，则结果为非负数，否则结果为负数inherited -
operator ~(
) → Long -
按位取反运算符。
将this视为足够大的二进制分量整数，结果是设置了相反位的数字。
这将任何整数x映射到-x - 1
inherited
-
operator ~/(
dynamic other) → Long -
除法取整
inherited