format():Format a string

static String format(Locale l, String format, Object... args)

Returns a formatted string using the specified locale, format string, and arguments.

static String format(String format, Object... args)

Returns a formatted string using the specified format string and arguments.

public class Main {
  public static void main(String[] argv) {
    System.out.println(String.format("%4d", 0));
    System.out.println(String.format("%4d", 11));
    System.out.println(String.format("%4d", 222));
    System.out.println(String.format("%4d", 3333));
  }
}

The output:

   0
  11
 222
3333

1. String type and Literals
2. String Concatenation
3. String.CASE_INSENSITIVE_ORDER
4. String Constructor
5. charAt(int index):Get a single char by index
6. String: compareTo(String stringValue)
7. concat(String str)
8. equals():Compare two string value for equality
9. equals( ) vs ==
10. contains(CharSequence s)
11. copyValueOf(char[] data)
12. endsWith(String suffix)
13. format():Format a string
14. getBytes():Get byte array from string
15. getChars()
16. indexOf
17. intern a string
18. isEmpty:if string is empty
19. lastIndexOf()
20. length() Returns the length of this string
21. startsWith( )
22. toLowerCase() and toUpperCase(): convert string case with locale
23. substring:Get sub string from a string
24. toCharArray():Get char array from string
25. toString( )
26. trim()
27. valueOf():Convert boolean, char, double, float,int,long,object to String