Setting Short Value Java
java short example
int to short java
java data types
java primitive types
java long max value
I am writing a little code in J2ME. I have a class with a method
setTableId(Short tableId). Now when I try to write
setTableId(100) it gives compile time error. How can I set the short value without declaring another short variable?
Long value I can use
setLongValue(100L) and it works. So, what does
L mean here and what's the character for
In Java, integer literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like
F to specify a long, double, or float, respectively. Note it is common practice to use uppercase letters for better readability.
The Java Language Specification does not provide the same syntactic sugar for byte or short types. Instead, you may declare it as such using explicit casting:
byte foo = (byte)0; short bar = (short)0;
setLongValue(100L) method call, you don't have to necessarily include the
L suffix because in this case the int literal is automatically widened to a long. This is called widening primitive conversion in the Java Language Specification.
Setting Short Value Java, Generally you can just cast the variable to become a short . You can use setTableId((short)100) . I think this was changed in Java 5 so that numeric literals assigned to byte or short and within range for the target are automatically assumed to be the target type. Java short data type range. The short data type in Java is a 16 bit signed integer value. Range of the short variable in Java is -32768 to 32767 (both inclusive). So a short variable can have a minimum value of -32768 while the maximum value it can hold is 32767. What happens when the string contains a number that is not in the range of the short?
There is no such thing as a byte or short literal. You need to cast to short using
Primitive Data Types (The Java™ Tutorials > Learning the Java , A variable's data type determines the values it may contain, plus the short: The short data type is a 16-bit signed two's complement integer. Fields that are declared but not initialized will be set to a reasonable default by the compiler. The java.lang.Short.valueOf(String s, int radix) method returns a Short object holding the value extracted from the specified String when parsed with the radix given by the second argument. The following example shows the usage of java.lang.Short.valueOf() method. package com.tutorialspoint; import
Generally you can just cast the variable to become a
You can also get problems like this that can be confusing. This is because the
+ operator promotes them to an
Casting the elements won't help:
You need to cast the expression:
Java.Lang.Short class in Java, Short(String s): Creates a Short object initialized with the short value provided by method containing only String as a parameter, radix is by defalut set to 10. The set() method of java.lang.reflect.Field is used to set the value of the field represented by this Field object on the specified object argument to the specified new value passed as parameter. The new value is automatically unwrapped if the underlying field has a primitive type.
You can use
setTableId((short)100). I think this was changed in Java 5 so that numeric literals assigned to byte or short and within range for the target are automatically assumed to be the target type. That latest J2ME JVMs are derived from Java 4 though.
Primitive Data Types in Java, An integral data type is a numeric data type whose values are integers. Java offers five integral data types: byte , short , int , long , and char . char data type is 0 to 65535, which is the same as the range of the Unicode set. This setting is intended only as a short-term workaround while you update your app to run correctly on version 3.x. This setting is supported as long as the 2.x runtime is supported. If you encounter issues that prevent your app from running on version 3.x without using this setting, please report your issue.
Java Data Types: Short, Int & Long, This is an important item to remember, since you can save some space and time by not having to always set the variables to a value (if you will assign values later ). A Boolean expression is a Java expression that returns a Boolean value: true or false. You can use a comparison operator, such as the greater than ( > ) operator to find out if an expression (or a variable) is true:
How to convert String value to Short value in Java, Short class has the following methods we can use to convert a string to a short type value. static short parseShort(String s) parses the string argument as a signed� The signed long has a minimum value of -2 63 and a maximum value of 2 63-1. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long, which has a minimum value of 0 and a maximum value of 2 64-1. Use this data type when you need a range of values wider than those provided by int.
how to assign some numeric values like 1 to a short variable , Also i tried to use java.lang.Short class like : ? 1. Short shortObj =� Creating Set Objects. Since Set is an interface, objects cannot be created of the type set.We always need a class which extends this list in order to create an object. And also, after the introduction of Generics in Java 1.5, it is possible to restrict the type of object that can be stored in the Set.
Lis just a suffix used to indicate a
- There are suffixes for other types as well:
Fmakes a float!
- Also: literals that fit into the size don't need to be cast: your two examples work without the cast as well.
- You are right on both. I should have been more clear that I'm talking about integer literals here, not about floating-point literals.
- @Joachim: No cast required only for J5+; J2ME is unfortunately still at J4 (a seriously stripped down J4).
- @JoachimSauer, what does "fit into the size" mean? I'm asking because I just had to specifically cast
(short)0to get around a
possible lossy conversion from int to shorterror, even though 0 is a short.
- Don't forget there's a reason why short + short = int. If the sum of two shorts is higher than the maximum short value of the machine, casting it to short will either produce unexpected results or throw an exception, if supported by languaje.
- With that logic, adding two ints would return a long ;)
- And I look for that if my sums can surpass Integer.MAX_VALUE. I'm not defending the decision of returning int (which is probably linked to the way the HW actually performs the sums), i'm just saying people should confirm that the result actually fills in a short before puting it there. I've encountered more bugs capping short capacity than capping int aswell, probably due to the size of the numbers involved. 2 tiny bytes java reservers for short cap up really fast
- I readed my comment again and I didn't make my point clear. The first sentence is confusing and I should have not said that and just left the rest, it looks like there are two related statements.The reason behind short + short being int can be read here: docs.oracle.com/javase/specs/jvms/se8/html/… , there are no sum operations for short in JVM. Java's int is 32 bits, and when this deccisions where made, most computers were 32 bits, so int looked like the best idea, I guess.
- Also note that, as explained here stackoverflow.com/a/27123302/9465588 , JVM did actually serverse at least 32 bits of its virtual memory space per class field, so declaring short fields does not save memory at all. I don't know if Java changed this. I tend to never use short values unless tere's an external restriction involved, like in a DAO