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I have to know if Object is String or any other class type, how can I do it? Currently I do it like below, but its not very good coding.
try { String myString = (String) object; // do stuff here } catch(Exception e) { // it wasn't string, so just continue } 
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The best way to checks if the object is a string is by using the isinstance() method in Python. This function returns True if the given object is an instance of class classified or any subclass of class info, otherwise returns False.
Use the typeof operator to get the type of an object or variable in JavaScript. The typeof operator also returns the object type created with the "new" keyword. As you can see in the above example, the typeof operator returns different types for a literal string and a string object.
The Java instanceof keyword is used to check if an object is a certain type. It returns true or false. For example, we can check if a variable is a type of String; we can test classes to see if they are certain types (e.g., is a Birch a Tree or a BoysName?).
There are different ways in JavaScript to check if an object is string or not in JavaScript. This post will show you couple of different ways with examples. The typeof operator can be used to check the type of an operand. If we use it with a string variable, it will return “string”.
In the below example, we are going to define the string in a literal form and an object form. Once the form is defined, we will be using the typeof or instanceof method for checking whether the string is of literal type or object type.
To use it, you just need to pass the object through the function as a parameter and you'll quickly get your answer. For example, if you're looking to find the type of an object that looks like this: one = ['purple', 'yellow', 'green'] You'll just need to use the type() function, like this: type(one)
In most languages, values are denoted by Integers, floating-point numbers, strings, boolean, characters, arrays, records, and many more. On the other hand, a JavaScript object can be defined as a list of unordered primitive data types (and sometimes reference data types) that are stored as a pair with key and value.
object instanceof Type is true if the object is a Type or a subclass of Type
object.getClass().equals(Type.class) is true only if the object is a Type
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Use the instanceof syntax.
Like so:
Object foo = ""; if( foo instanceof String ) { // do something String related to foo } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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