public class StringSearchDemo { public static void main(String[] args) { String originalString = "Hello, World!"; int index = originalString.indexOf('!'); int index1 = originalString.indexOf("World"); int index2 = originalString.indexOf("@"); boolean isContains = originalString.contains("World"); boolean isPresent = originalString.contains("@"); boolean startsWith = originalString.startsWith("Hello"); boolean endsWith = originalString.endsWith("ld!"); boolean isMatched = originalString.matches(".*World.*"); } }