Java 7 has been launched on July 7, 2011 . This release puts Java back on the tracks with a host of new features and improvements, moving Java 7 forward for developers, the industry, and the ecosystem.
So,All of you are wondering what’s new in JAVA 7 ,Ya I’ll discuss some code spinets in this article which will tell how JAVA 7 differ from last release.Here we go
1) Strings in switch
switch (database) {
case “oracle”:
case “sqlserver”:
break;
case “postgres”:
break;
case “mysql”:
break;
default:
}
Note:Now we can compare the string in switch case earlier all the data types were possible except string.So,they made it for string also,Which acc to me is best.
2) try-with-resources statement
try (InputStream is = new FileInputStream(new File(“data.txt”))) {
// read file
// …
}
catch (IOException ex) {
// handle this error
- try can now have multiple statements in the parenthesis and each statement should create an object which implements the new java.lang.AutoClosable interface. The AutoClosable interface consists of just one method.
void close() throws Exception {}
3) Throw statement precisely
public void display(String[] args) throws IOException {
try {
loadFileToDb();
} catch (final Exception ex) {
System.err.print(ex.getMessage());
throw ex;
}
4) Multiple catch statement
try {
doSomething();
} catch (Exception1 | Exception2 ex) {
printException1();
} catch (Exception3 | Exception4 ex) {
printException2();
5) Binary integral literals
- We can create numerical literals by adding binary notation prefix “0b”
int no = 0b1010;
System.out.println(“no = ” + no);
Output
no = 10
6) Underscores in numeric literals
- We can include underscores in numeric literals to make them more readable. The underscore is only present in the representation of the literal in Java code, and will not show up when you print the value.
int tenMillion = 10_999_999_0;
System.out.println(“Amount is “ + tenMillion);
Output
109999990
7) Improved type interface for generic instance creation
- Java 7 tries to get rid of this redundancy by introducing a left to right type inference. You can now rewrite the same statement by using the <> construct.
Map> retVal = new HashMap<>();
8) Advanced new I/O API
- This addition is also known as New I/O API (NIO).
See http://download.java.net/jdk7/docs/api/java/nio/file/Files.html
9) Watch Service
- It provides an API that lets you “listen” to a certain type of file system events. Your code gets called automatically when those events occur.
SO,These are some New Features of Java 7,keep reading
So,All of you are wondering what’s new in JAVA 7 ,Ya I’ll discuss some code spinets in this article which will tell how JAVA 7 differ from last release.Here we go
Java 7: Features & Enhancements
1) Strings in switch
switch (database) {
case “oracle”:
case “sqlserver”:
break;
case “postgres”:
break;
case “mysql”:
break;
default:
}
Note:Now we can compare the string in switch case earlier all the data types were possible except string.So,they made it for string also,Which acc to me is best.
2) try-with-resources statement
try (InputStream is = new FileInputStream(new File(“data.txt”))) {
// read file
// …
}
catch (IOException ex) {
// handle this error
- try can now have multiple statements in the parenthesis and each statement should create an object which implements the new java.lang.AutoClosable interface. The AutoClosable interface consists of just one method.
void close() throws Exception {}
3) Throw statement precisely
public void display(String[] args) throws IOException {
try {
loadFileToDb();
} catch (final Exception ex) {
System.err.print(ex.getMessage());
throw ex;
}
4) Multiple catch statement
try {
doSomething();
} catch (Exception1 | Exception2 ex) {
printException1();
} catch (Exception3 | Exception4 ex) {
printException2();
5) Binary integral literals
- We can create numerical literals by adding binary notation prefix “0b”
int no = 0b1010;
System.out.println(“no = ” + no);
Output
no = 10
6) Underscores in numeric literals
- We can include underscores in numeric literals to make them more readable. The underscore is only present in the representation of the literal in Java code, and will not show up when you print the value.
int tenMillion = 10_999_999_0;
System.out.println(“Amount is “ + tenMillion);
Output
109999990
7) Improved type interface for generic instance creation
- Java 7 tries to get rid of this redundancy by introducing a left to right type inference. You can now rewrite the same statement by using the <> construct.
Map
8) Advanced new I/O API
- This addition is also known as New I/O API (NIO).
See http://download.java.net/jdk7/docs/api/java/nio/file/Files.html
9) Watch Service
- It provides an API that lets you “listen” to a certain type of file system events. Your code gets called automatically when those events occur.
SO,These are some New Features of Java 7,keep reading
