All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`contains(String input, String substring)`
`static boolean`	`containsIgnoreCase(String input, String substring)`
`static boolean`	`endsWith(String input, String substring)`
`static String`	`escapeXml(String input)`
`static int`	`indexOf(String input, String substring)`
`static String`	`join(String[] array, String separator)`
`static int`	`length(Object obj)`
`static String`	`replace(String input, String substringBefore, String substringAfter)`
`static String[]`	`split(String input, String delimiters)`
`static boolean`	`startsWith(String input, String substring)`
`static String`	`substring(String input, int beginIndex, int endIndex)`
`static String`	`substringAfter(String input, String substring)`
`static String`	`substringBefore(String input, String substring)`
`static String`	`toLowerCase(String input)`	Converts all of the characters of the input string to lower case.
`static String`	`toUpperCase(String input)`	Converts all of the characters of the input string to upper case.
`static String`	`trim(String input)`

toUpperCase
```
public static String toUpperCase(String input)
```
Converts all of the characters of the input string to upper case.

toLowerCase
```
public static String toLowerCase(String input)
```
Converts all of the characters of the input string to lower case.

public static int indexOf(String input,
                          String substring)

public static boolean contains(String input,
                               String substring)

public static boolean containsIgnoreCase(String input,
                                         String substring)

public static boolean startsWith(String input,
                                 String substring)

public static boolean endsWith(String input,
                               String substring)

public static String substring(String input,
                               int beginIndex,
                               int endIndex)

public static String substringAfter(String input,
                                    String substring)

public static String substringBefore(String input,
                                     String substring)

public static String escapeXml(String input)

public static String trim(String input)

public static String replace(String input,
                             String substringBefore,
                             String substringAfter)

public static String[] split(String input,
                             String delimiters)

public static int length(Object obj)
                  throws jakarta.servlet.jsp.JspTagException

public static String join(String[] array,
                          String separator)

Class Functions