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For example, in Haxe I can create strictly typed variables:
var a:Float = 1.1; or var b:String = "hello" and also dynamic, if needed:
var d:Dynamic = true;
d = 22;
d = "hi";
How do I create this kind of variables in Java?
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In programming, dynamic variable names don't have a specific name hard-coded in the script. They are named dynamically with string values from other sources.
Declaring (Creating) Variablestype variableName = value; Where type is one of Java's types (such as int or String ), and variableName is the name of the variable (such as x or name). The equal sign is used to assign values to the variable.
A dynamic variable is a variable you can declare for a StreamBase module that can thereafter be referenced by name in expressions in operators and adapters in that module. In the declaration, you can link each dynamic variable to an input or output stream in the containing module.
If any variable is not assigned with value at compile-time and assigned at run time is called dynamic initialization of a variable. Basically, this is achieved through constructors, setter methods, normal methods and builtin api methods which returns a value or object.
You can use Object
Object d = true;
d = 22;
d = "hi";
and you can use instanceof operator to check which type of data d is holding
Object d = true;
System.out.println(d instanceof Boolean); // true
d = 22;
d = "hi";
System.out.println(d instanceof Integer); // false
System.out.println(d instanceof String); // true
The Type Comparison Operator instanceof
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