The java.nio.file package has improved exception handling. true or false?

Before JDK 7, only integral types (such as int, char) can be used as selector for

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

0 statement. In JDK 7, you can use a

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

1 object as the selector. For example,

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JDK 7 Library Changes
Which of the following static method is not provided by the files class to check file properties or duplication?
What class is the split () method a member of?

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

2 method is used in comparison, which is case-sensitive. Java compiler can generate more efficient code on switch than nested if-else statement.

This feature is handy in handling options specified in command-line arguments, which are

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

1s. For example, the following code is slightly neater code than using nested if-else statement:

> javac JDK7SwitchOnStringTest.java

> java JDK7SwitchOnStringTest -c -d
create: true
verbose: false
debug: true

Binary Integer Literals with Prefix "0b" and Underscore in Numeric Literals

In JDK 7, you can express literal values in binary with prefix '

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

5' (or '

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

6') for integral types (

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

8, int and

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

0), similar to C/C++ language. Before JDK 7, you can only use octal values (with prefix '

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

1') or hexadecimal values (with prefix '

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

2' or '

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

3').

You are also permitted to use underscore (

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

4) to break the digits to improve the readability but you must start and end with a digit, e.g.,

For example,

1352847522(50a2d0a2)(12050550242)(true)
109(6d)(155)(true)

In JDK 7, you could insert underscore (

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

4) in between the digits in a numeric literals (integral and floating-point literals) to improve readability. For example,

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

Catching Multiple Exception Types and Rethrowing Exceptions with Improved Type Checking

In JDK 7, a single

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

6 block can handle more than one exception types.

For example, prior to JDK 7, you need two

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

6 blocks to catch two exception types although both perform identical task:

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

In JDK 7, you could use one single

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

6 block, with exception types separated by a vertical bar (

int anInt = 0b10101000_01010001_01101000_01010001;
double aDouble = 3.1415_9265;
float  aFloat = 3.14_15_92_65f;

9).

try {
   ......
} catch(ClassNotFoundException|SQLException ex) {
   ex.printStackTrace();
}

[TODO] A complete example on file IO.

Automatic Resource Management in try-with-resources Statement

Before JDK 7, we need to use a

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

0 statement to manage resources. We need a

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

1 block, to ensure that the resources are properly closed regardless of whether the try completes normally or abruptly. The code is messy! For example,

JDK 7 introduces a try-with-resources statement, which ensures that each of the resources in

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

4 is properly closed at the end of the statement. This results in cleaner codes.

Improved Type Inference for Generic Instance Creation with the Diamond Operator <>

For example,

Simplified varargs Method Declaration with @SafeVarargs Annotation

In JDK 7, you have the option of using

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

5 annotation to suppress the warning you get when compiling a method with a non-reifiable varargs parameter. This annotation should be used when the method ensures that only elements of the same type as the varargs parameter are stored in the varargs array.

Example [TODO]

JDK 7 Library Changes

New File IO Libraries (JSR 203)

JDK 7 added support for multiple file systems, file metadata and symbolic links in new packages

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

7 and

try {
   ......
} catch(ClassNotFoundException ex) {
   ex.printStackTrace();
} catch(SQLException ex) {
   ex.printStackTrace();
}

Which of the following static method is not provided by the files class to check file properties or duplication?

Which of the following static methods is not provided by the Files class to check file properties or duplication? Files. isArchived(Path p);

What class is the split () method a member of?

The Split() method is part of the string class in C#. The method is used to split a string based on the delimiters passed to the string. The delimiters can be a character, an array of characters, or even an array of strings.