The document discusses new features in Java 7 including the ability to use strings in switch statements, catch multiple exceptions in a single catch block, improved generics with the diamond operator, underscore separators in long numbers, try-with-resources for automatic resource management, and new classes/interfaces in the collections API like Phaser and ThreadLocalRandom. It encourages visiting the listed blog for more information on Java 7 features.

1. Java 7 – New features
Everything you wanted to know about Java
7
http://arraylist.blogspot.com

2. Java 7 – New features
String data type in the switch block for the switch-case statement.
public void getArea(FloorPlan fp) {
String shape = fp.getShape();
switch (shape) {
case SQUARE:
calculateArea(fp.getLength());
break;
case RECTANGLE:
calculateArea(fp.getLength() * fp.getBreadth());
break;
default:
break;
}
}
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3. Java 7 – New features
Enhanced catch block in the try-catch
statement. A single catch block to catch multiple
exception - where the exceptions are separated
by pipes.
try {
someMethod();
}
catch (ExceptionA | ExceptionB | ExceptionC e)
{
// handle exceptions
}
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4. Java 7 – New features
Collections api introduces - A lightweight
fork/join framework.
More classes –
Phaser - a resuable and flexible
synchronization barrier
ThreadLocalRandom – generates a random
number dedicated to the present thread.
Interfaces - ConcurrentLinkedDeque
,TransferQueue .
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5. Java 7 – New features
Improved Diamond(<>) operator in generics where the
data type inside the <> generic operator of the left hand
side is automatically inferred to the right hand side to
improve readability and reduce code clutter.
for example :-
//previously
List<Integer, List<String>> list = new ArrayList<Integer,
List<String>>();
//in jdk7
List<Integer, List<String>> list = new ArrayList<>();
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6. Java 7 – New features
Numerical literals
Long numbers are easier to read and neatly
identified using numerical literals
Now 1 million can be declared in a more
readable way.
Old
int onemillion = 1000000;
New
int onemillion = 1_000_000;
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7. Java 7 – New features
The enhanced try statement as
try-with-resource
try(FileInputStream fis = new
FileInputStream("somefile.txt")){
//do something
}
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8. Java 7 – New features
For more interesting stuff visit
http://arraylist.blogspot.com
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