Java Data Type Conversions: Converting String, Character, Integer, and Floating Point

How can you convert a string to an integer in Java?

a. Use the parseInt() method

How can you convert a character to an integer in Java?

b. Cast it to an int

How can you convert an integer to a character in Java?

c. Use the charAt() method

How can you convert a floating point number to an integer in Java?

d. Use the intValue() method

Answers:

a. To convert a string to an integer in Java, you can use the parseInt() method.

b. To convert a character to an integer in Java, you can cast it to an int.

c. To convert an integer to a character in Java, you can use the charAt() method.

d. To convert a floating point number to an integer in Java, you can use the intValue() method.

Java provides various methods to convert data types such as string, character, integer, and floating point numbers to different data types. Let's break down each conversion process:

Converting String to Integer:

To convert a string to an integer in Java, you can use the parseInt() method. This method parses the string argument as a signed decimal integer. Here's an example:

String str = "123";

int num = Integer.parseInt(str);

Converting Character to Integer:

To convert a character to an integer in Java, you can simply cast the character to an int. The ASCII value of the character will be converted to its corresponding integer value. Here's an example:

char ch = 'A';

int value = (int) ch;

Converting Integer to Character:

To convert an integer to a character in Java, you can use the charAt() method. This method returns the character value at the specified index. Here's an example:

int num = 65;

char ch = (char) num;

Converting Floating Point to Integer:

To convert a floating point number to an integer in Java, you can use the intValue() method. This method returns the value of this Float as an int. Here's an example:

float num = 3.14f;

int value = (int) num;

By understanding these conversion methods, you can manipulate and transform different data types in Java with ease.