模块 jmc.utils

程序包 com.jmc.lang

类 BuiltIns

java.lang.Object

com.jmc.lang.BuiltIns

public class BuiltIns
extends Object

Java内置函数

从以下版本开始:

3.8

API Note:

 import static com.jmc.lang.Builtins.*;

 // In JDK 21
 void main() {
     print(666);
     println();
     printf("%d + %d = %d\n", 3, 4, 3 + 4);

     println(sqrt(9));
     println(pow(2, 5));
     println(round(3.4f));
     println(round(4.7d));
     println(abs(-3));
     println(max(3, 4));
     println(min(-1, 2));
 }
 

方法概要

修饰符和类型	方法	说明
static int	abs(int a)	Returns the absolute value of an int value.
static long	abs(long a)	Returns the absolute value of a long value.
static double	max(double a, double b)	Returns the greater of two double values.
static float	max(float a, float b)	Returns the greater of two float values.
static int	max(int a, int b)	Returns the greater of two int values.
static long	max(long a, long b)	Returns the greater of two long values.
static double	min(double a, double b)	Returns the smaller of two double values.
static float	min(float a, float b)	Returns the smaller of two float values.
static int	min(int a, int b)	Returns the smaller of two int values.
static long	min(long a, long b)	Returns the smaller of two long values.
static double	pow(double a, double b)	Returns the value of the first argument raised to the power of the second argument.
static void	print(boolean b)	Prints a boolean value.
static void	print(char c)	Prints a character.
static void	print(char[] s)	Prints an array of characters.
static void	print(double d)	Prints a double-precision floating-point number.
static void	print(float f)	Prints a floating-point number.
static void	print(int i)	Prints an integer.
static void	print(long l)	Prints a long integer.
static void	print(Object obj)	Prints an object.
static void	print(String s)	Prints a string.
static PrintStream	printf(String format, Object... args)	Formats a string according to a format string and writes the formatted string to the standard output stream, using the specified arguments.
static PrintStream	printf(Locale l, String format, Object... args)	Formats a string according to a format string and the specified locale, then writes the formatted string to the standard output stream, using the specified arguments.
static void	println()	Terminates the current line by writing the line separator string.
static void	println(boolean x)	Prints a boolean value and then terminate the line.
static void	println(char x)	Prints a character and then terminate the line.
static void	println(char[] x)	Prints an array of characters and then terminate the line.
static void	println(double x)	Prints a double-precision floating-point number and then terminate the line.
static void	println(float x)	Prints a floating-point number and then terminate the line.
static void	println(int x)	Prints an integer and then terminate the line.
static void	println(long x)	Prints a long integer and then terminate the line.
static void	println(Object x)	Prints an object and then terminate the line.
static void	println(String x)	Prints a string and then terminate the line.
static long	round(double a)	Returns the closest long to the argument, with ties rounding to positive infinity.
static int	round(float a)	Returns the closest int to the argument, with ties rounding to positive infinity.
static double	sqrt(double a)	Returns the correctly rounded positive square root of a double value.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

print

public static void print(boolean b)

Prints a boolean value.

参数:

b - the boolean to print

另请参阅:

• PrintStream.print(boolean)

print

public static void print(char c)

Prints a character.

参数:

c - the character to print

另请参阅:

• PrintStream.print(char)

print

public static void print(int i)

Prints an integer.

参数:

i - the integer to print

另请参阅:

• PrintStream.print(int)

print

public static void print(long l)

Prints a long integer.

参数:

l - the long integer to print

另请参阅:

• PrintStream.print(long)

print

public static void print(float f)

Prints a floating-point number.

参数:

f - the float to print

另请参阅:

• PrintStream.print(float)

print

public static void print(double d)

Prints a double-precision floating-point number.

参数:

d - the double to print

另请参阅:

• PrintStream.print(double)

print

public static void print(char[] s)

Prints an array of characters.

参数:

s - the array of characters to print

另请参阅:

• PrintStream.print(char[])

print

public static void print(String s)

Prints a string.

参数:

s - the string to print

另请参阅:

• PrintStream.print(String)

print

public static void print(Object obj)

Prints an object.

参数:

obj - the object to print

另请参阅:

• PrintStream.print(Object)

println

public static void println()

Terminates the current line by writing the line separator string.

另请参阅:

• PrintStream.println()

println

public static void println(boolean x)

Prints a boolean value and then terminate the line.

参数:

x - the boolean to print

另请参阅:

• PrintStream.println(boolean)

println

public static void println(char x)

Prints a character and then terminate the line.

参数:

x - the character to print

另请参阅:

• PrintStream.println(char)

println

public static void println(int x)

Prints an integer and then terminate the line.

参数:

x - the integer to print

另请参阅:

• PrintStream.println(int)

println

public static void println(long x)

Prints a long integer and then terminate the line.

参数:

x - the long integer to print

另请参阅:

• PrintStream.println(long)

println

public static void println(float x)

Prints a floating-point number and then terminate the line.

参数:

x - the float to print

另请参阅:

• PrintStream.println(float)

println

public static void println(double x)

Prints a double-precision floating-point number and then terminate the line.

参数:

x - the double to print

另请参阅:

• PrintStream.println(double)

println

public static void println(char[] x)

Prints an array of characters and then terminate the line.

参数:

x - the array of characters to print

另请参阅:

• PrintStream.println(char[])

println

public static void println(String x)

Prints a string and then terminate the line.

参数:

x - the string to print

另请参阅:

• PrintStream.println(String)

println

public static void println(Object x)

Prints an object and then terminate the line.

参数:

x - the object to print

另请参阅:

• PrintStream.println(Object)

printf

public static PrintStream printf(String format,
 Object... args)

Formats a string according to a format string and writes the formatted string to the standard output stream, using the specified arguments.

参数:

format - a format string

args - arguments referenced by the format specifiers in the format string

返回:

the PrintStream object itself

另请参阅:

• PrintStream.printf(String, Object...)

printf

public static PrintStream printf(Locale l,
 String format,
 Object... args)

Formats a string according to a format string and the specified locale, then writes the formatted string to the standard output stream, using the specified arguments.

参数:

l - the locale to apply during formatting. If l is null, no localization is applied.

format - a format string

args - arguments referenced by the format specifiers in the format string

返回:

the PrintStream object itself

另请参阅:

• PrintStream.printf(Locale, String, Object...)

sqrt

public static double sqrt(double a)

Returns the correctly rounded positive square root of a double value.

参数:

a - a value

返回:

the positive square root of a

另请参阅:

• Math.sqrt(double)

pow

public static double pow(double a,
 double b)

Returns the value of the first argument raised to the power of the second argument.

参数:

a - the base

b - the exponent

返回:

the value ab.

另请参阅:

• Math.pow(double, double)

round

public static int round(float a)

Returns the closest int to the argument, with ties rounding to positive infinity.

参数:

a - a floating-point value to be rounded to an integer.

返回:

the value of the argument rounded to the nearest int value.

另请参阅:

• Math.round(float)

round

public static long round(double a)

Returns the closest long to the argument, with ties rounding to positive infinity.

参数:

a - a floating-point value to be rounded to a long.

返回:

the value of the argument rounded to the nearest long value.

另请参阅:

• Math.round(double)

abs

public static int abs(int a)

Returns the absolute value of an int value.

参数:

a - the argument whose absolute value is to be determined

返回:

the absolute value of a.

另请参阅:

• Math.abs(int)

abs

public static long abs(long a)

Returns the absolute value of a long value.

参数:

a - the argument whose absolute value is to be determined

返回:

the absolute value of a.

另请参阅:

• Math.abs(long)

max

public static int max(int a,
 int b)

Returns the greater of two int values.

参数:

a - an int

b - another int

返回:

the larger of a and b.

另请参阅:

• Math.max(int, int)

max

public static long max(long a,
 long b)

Returns the greater of two long values.

参数:

a - a long

b - another long

返回:

the larger of a and b.

另请参阅:

• Math.max(long, long)

max

public static float max(float a,
 float b)

Returns the greater of two float values.

参数:

a - a float

b - another float

返回:

the larger of a and b.

另请参阅:

• Math.max(float, float)

max

public static double max(double a,
 double b)

Returns the greater of two double values.

参数:

a - a double

b - another double

返回:

the larger of a and b.

另请参阅:

• Math.max(double, double)

min

public static int min(int a,
 int b)

Returns the smaller of two int values.

参数:

a - an int

b - another int

返回:

the smaller of a and b.

另请参阅:

• Math.min(int, int)

min

public static long min(long a,
 long b)

Returns the smaller of two long values.

参数:

a - a long

b - another long

返回:

the smaller of a and b.

另请参阅:

• Math.min(long, long)

min

public static float min(float a,
 float b)

Returns the smaller of two float values.

参数:

a - a float

b - another float

返回:

the smaller of a and b.

另请参阅:

• Math.min(float, float)

min

public static double min(double a,
 double b)

Returns the smaller of two double values.

参数:

a - a double

b - another double

返回:

the smaller of a and b.

另请参阅:

• Math.min(double, double)