Java Language Java SE 7 Features New Java SE 7 programming language features
Example
- Binary Literals: The integral types (byte, short, int, and long) can also be expressed using the binary number system. To specify a binary literal, add the prefix 0b or 0B to the number.
- Strings in switch Statements: You can use a String object in the expression of a switch statement
- The try-with-resources Statement: The try-with-resources statement is a try statement that declares one or more resources. A resource is as an object that must be closed after the program is finished with it. The try-with-resources statement ensures that each resource is closed at the end of the statement. Any object that implements java.lang.AutoCloseable, which includes all objects which implement java.io.Closeable, can be used as a resource.
- Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking: a single catch block can handle more than one type of exception. This feature can reduce code duplication and lessen the temptation to catch an overly broad exception.
- Underscores in Numeric Literals: Any number of underscore characters (_) can appear anywhere between digits in a numerical literal. This feature enables you, for example, to separate groups of digits in numeric literals, which can improve the readability of your code.
- Type Inference for Generic Instance Creation: You can replace the type arguments required to invoke the constructor of a generic class with an empty set of type parameters (<>) as long as the compiler can infer the type arguments from the context. This pair of angle brackets is informally called the diamond.
- Improved Compiler Warnings and Errors When Using Non-Reifiable Formal Parameters with Varargs Methods
