Java String format() Method

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Java String format()

The format() method formats strings in a desired format by inserting objects and variables with specified padding into other strings.

Note: This method manages formatting including the position, alignment, and format type.

Example

Java Compiler
public class myClass { public static void main(String[] args) { String str = String.format("Name: %s", "John Doe"); System.out.print(str); } }

Output

Name: John Doe

Syntax

public String Format(str, obj1, obj2, ...)

Parameter Values

ValueTypeExplanation
strRequiredSpecifies a string.
obj1, obj2, ...RequiredSpecifies objects to replace one or more format items in a string.

Return Value

ValueExplanation
StringReturns a formatted string.

More Examples

We can specify that value (like an int) can be formatted inside String.Format().

Example

Java Compiler
public class myClass { public static void main(String[] args) { String str = String.format("Lucky Number: %d", 45); System.out.print(str); } }

Output

Lucky Number: 45

Formatting a string with specified padding.

Note: A negative number will add padding to the right (left-align). whereas, a positive padding size to add padding to the left (right-align).

Example

Java Compiler
public class myClass { public static void main(String[] args) { String str = String.format("Number with Padding: %10d", 45); System.out.print(str); } }

Output

Number with Padding: 45

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