Java - Convert Integer to String

Conversion basics and efficiency

The process of morphing one data type to another is a common task in programming. Java provides several ways to convert an int to a String.

• String.valueOf(number): Superhero method that uses Integer.toString() powers.
• Integer.toString(number): The raw power of converting integers into strings.
• "" + number: The quick but energy-consuming sidekick (less efficient due to possible StringBuilder object creation).

The first two methods are your most powerful allies - put them on speed dial for performance and clarity.

Choosing the right conversion tool

In the battle against type conversion, your choice of weapon depends on your battlefield (context):

• For an all-string battleground, String.valueOf(number) holds the sword with clarity and conciseness.
• In integer territory, Integer.toString(number) offers a shield for specific integer operations and formatting.

Round off your skills: Practical bits and tricks

In the world of type conversion, you encounter various villains (use-cases) that require special skills.

Displaying formatted numbers (leading zeros)

In the realm where leading zeros matter, String.format is your secret weapon:

int num = 5;
String formattedStr = String.format("%03d", num); // "005", because even zeros need some love
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Handling large integers

Don't underestimate the rebels (large numbers). With Long.toString(long), you can conquer even the mightiest:

long bigNum = 12345678901L;
String str = Long.toString(bigNum); // "12345678901", because size does matter!
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Steering clear from trouble

Stay away from the dark alleys of custom solutions or obscure hacks. Stick to trusted methods for they are the chosen ones with battle scars (optimized by the JVM).

The art of writing readable code

In the realm of programming, the best code is the code that speaks to humans. Make your intent clear, simple and eloquent. Remember, good code is a poem that a machine can read.