Java (native classes)
IoTize specific
The IOT_JVM environment has several subclasses, detailed here, that give access to the TapNLink environment. They are implemented in the TapNLink firmware as native code, but they are not fully compliant with their official JAVA implementation (only a few methods are available).
The TapNLinkVar object provides a simple synchronization between the variables of the IOTIZE STUDIO project and the IOT_JVM. Depending on the variable type (float, byte, int, array,…), various predefined subclasses exist (see \IoTize\IoTize Studio\bin\com\iotize\jvm).
“java/lang” classes
Class java/lang/Integer
public Integer valueOf(int i)
Returns an Integer instance representing the specified int value.
public Integer valueOf(String s)
Returns an Integer object holding the value of the specified String.
public int intValue()
Returns the value of this Integer as an int.
Class java/lang/Short
public Short valueOf(short s)
Returns a Short instance representing the specified short value.
public Short valueOf(String s)
Returns a Short object holding the value of the specified String.
public short shortValue()
Returns the value of this Short as a short.
Class java/lang/Boolean
public Boolean valueOf(boolean s)
Returns a Short instance representing the specified boolean value.
public Boolean valueOf(String s)
Returns a Boolean object holding the value of the specified String.
public boolean booleanValue()
Returns the value of this Boolean as a boolean.
Class java/lang/Byte
public Byte valueOf(byte s)
Returns a Byte instance representing the specified byte value.
public Byte valueOf(String s)
Returns a Byte object holding the value of the specified String.
public byte byteValue()
Returns the value of this Byte as a byte.
Class java/lang/Character
public Character valueOf(char c)
Returns a Character instance representing the specified char value.
public char charValue(char c)
Returns the value of this Character as a char.
Class java/lang/Long
public Long valueOf(long s)
Returns a Long instance representing the specified long value.
public Long valueOf(String s)
Returns a Long object holding the value of the specified String.
public long longValue()
Returns the value of this Long as a long.
public double doubleValue()
Returns the value of this Long as a double.
Class java/lang/Float
public Float valueOf(float s)
Returns a Float instance representing the specified float value.
public Float valueOf(String s)
Returns a Float object holding the value of the specified String.
public float floatValue()
Returns the value of this Float as a float.
public int floatToIntBits(float s)
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point "single format" bit layout.
public float intBitsToFloat(int s)
Returns the float value corresponding to a given bit representation.
Class java/lang/Double
public Double valueOf(double s)
Returns a Double instance representing the specified double value.
public Double valueOf(String s)
Returns a Double object holding the value of the specified String.
public double doubleValue()
Returns the value of this Double as a double.
public double longBitsToDouble(long s)
Returns the double value corresponding to a given bit representation.
public Long doubleToLongBits(double s)
Returns a representation of the specified floating-point value according to the IEEE 754 floating-point "double format" bit layout.
Class java/lang/String
public String()
Initializes a newly created String object so that it represents an empty character sequence.
public String(byte[] bytes)
Constructs a new String by decoding the specified array of bytes using the platform's default charset.
public String(String original)
Initializes a newly created String object so that it represents the same sequence of characters as the argument; in other words, the newly created string is a copy of the argument string.
public String format(String format, Object... args)
Returns a formatted string using the specified format string and arguments.
public int length()
Returns the length of this string.
public char charAt(int index)
Returns the char value at the specified index. An index ranges from 0 to length() - 1. The first char value of the sequence is at index 0, the next at index 1, and so on, as for array indexing.
public byte[] getBytes()
Encodes this String into a sequence of bytes using the utf8 charset, storing the result into a new byte array.
Returns the resultant byte array
public char[] toCharArray()
Returns this string to a new character array.
public boolean equals(Object s)
Compares this string to the specified object.
public String substring(int beginIndex)
Returns a new string that is a substring of this string.
public String substring(int beginIndex, int endIndex)
Returns a new string that is a substring of this string.
public int compareTo(String s)
Compares two strings lexicographically.
public String hashCode()
Returns a hash code for this string.
Class java/lang/StringBuilder
public StringBuilder()
Constructs a string builder with no characters in it and an initial capacity of 16 characters.
public StringBuilder append:(String str)
Appends the specified string to this character sequence.
Returns a reference to the resulting object
public StringBuilder append(char i)
Appends the string representation of the char argument to this sequence.
public StringBuilder append(int i)
Appends the string representation of the int argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public StringBuilder append(short i)
Appends the string representation of the short argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public StringBuilder append(double i)
Appends the string representation of the double argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public StringBuilder append(float i)
Appends the string representation of the float argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public StringBuilder append(long i)
Appends the string representation of the long argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public StringBuilder append(byte i)
Appends the string representation of the byte argument to this sequence. The overall effect is exactly as if the argument were converted to a string by the method String.valueOf(int), and the characters of that string were then appended to this character sequence.
public String toString()
Returns a string representing the data in this sequence.
public int length()
Returns the length (character count).
public char charAt (int pos)
Returns the char value in this sequence at the specified index. The first char value is at index 0, the next at index 1, and so on, as in array indexing.
The index argument must be greater than or equal to 0, and less than the length of this sequence.
Class java/lang/Math
public double sin(double val)
Returns the sine of val; the returned angle is in the range 0.0 through pi.
public double cos(double val)
Returns the cosine of val; the returned angle is in the range 0.0 through pi.
public double acos(double val)
Returns the arc cosine of val; the returned angle is in the range 0.0 through pi.
public double asin(double val)
Returns the arc sine of val; the returned angle is in the range -pi/2 through pi/2.
public double tan(double val)
Returns the trigonometric tangent of an angle.
public double atan(double val)
Returns the arc tangent of val; the returned angle is in the range -pi/2 through pi/2.
public double exp(double val)
Returns Euler's number e raised to the power of a double value.
public double log(double val)
Returns the natural logarithm (base e) of a double value.
public double log10(double val)
Returns the base 10 logarithm of a double value.
public double abs(double val)
Returns the absolute value of a double value.
public double pow(double a, double b)
Returns the value of the first argument raised to the power of the second argument.
public double sqrt(double val)
Returns the correctly rounded positive square root of a double value.
public double floor(double val)
Returns the largest (closest to positive infinity) double value that is less than or equal to the argument and is equal to a mathematical integer.
For all others classes, please refer to this document.