It's a data structure where we save items that are comparable. Furthermore, the items of an array are kept in a single memory address. Non-primitive data types - such as String, Arrays, ArrayList, Integer, Long, etc.Īn array in Java is an object that contains elements of the same data type. Hence there are 8 primitive data types, that is, byte, short, int, long, float, double, boolean and char It has a minimum value of '\u0000' (or 0) and a maximum value of '\uffff' (or 65,535 inclusive). For decimal values, this data type is generally the default choice.īoolean: The boolean data type has only two possible values: true and false.Ĭhar: The char data type is a single 16-bit Unicode character. įloat: The float data type is a single-precision 32-bit IEEE 754 floating point.ĭouble: The double data type is a double-precision 64-bit IEEE 754 floating point. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long. The signed long has a minimum value of -263 and a maximum value of 263-1. Long: The long data type is a 64-bit two's complement integer. In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of 232-1. Int: By default, the int data type is a 32-bit signed two's complement integer, which has a minimum value of -231 and a maximum value of 231-1. It has a minimum value of -32,768 and a maximum value of 32,767 (inclusive). Short: The short data type is a 16-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive). The eight primitive data types supported by the Java programming language are:īyte : The byte data type is an 8-bit signed two's complement integer.
Catch block must be used after the try block. Catch block is used to handle the exception by declaring the type of exception with the parameter.
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Try block is used to enclose the code that throws an exception. There are two blocks to handle an exception: try and catch block. Exception handler chosen is said to catch the exception. Search begins with the method in which the error occurred and proceeds through the list of methods in reverse order. Run time system searches the list of methods that can handle the exception. This process is known as throwing an exception.Īfter this, the run time system finds something to handle it. When an error occurs within a method, the method creates an object known as an exception object which contains information about the error. Example: if the program tries to open a file that does not exist, divide by zero, etc. In computer programming, an exception is a special condition encountered during program execution or run time.
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