import java.util.regex.Pattern;

import java.util.regex.Matcher;;

public class RETest {

private static final String Matcher = null;

public static void main(String[] args) {

// TODO Auto-generated method stub

/*System.out.println("abc".matches("..."));

p("a7589h".replaceAll("\\d", "-"));

Pattern pattern = Pattern.compile("[a-z]{3}");

Matcher matcher = pattern.matcher("jhg");

p(matcher.matches());*/

// p("125.125.125.125".matches("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}"));

/*p("jichangfeng67@gmail.com".matches(".+@.+\\..+"));

p("jichan-gfeng67@gmail.com".matches("[0-9a-z_.]*@.+\\..+"));*/

//p(" \t\n\r".matches("\\s{4}"));

// p("jichangfeng67@gmail.com".matches("[0-9a-zA-Z._]+@[\\w[._]]+\\..{1,10}"));

/*String s = "123-1234-12345-12";

Pattern pattern = Pattern.compile("\\d{3,5}");

Matcher matcher1 = pattern.matcher(s);

p(matcher1.find());

p(matcher1.find());

p(matcher1.find());

p(matcher1.find());*/

String s = "Java JAVA bdhsjad java";

// Pattern pattern = Pattern.compile("[jJ]{1}[aA]{1}[vV]{1}[aA]{1}");

Pattern pattern = Pattern.compile("java", Pattern.CASE_INSENSITIVE);

Matcher matcher = pattern.matcher(s);

p(matcher.replaceAll("JaVa"));

matcher.reset();

StringBuffer sb = new StringBuffer();

int cnt = 0;

while(matcher.find()){

cnt++;

if(cnt % 2 == 0){

matcher.appendReplacement(sb, "JAva");

}else{

matcher.appendReplacement(sb, "jaVA");

}

}

//matcher.appendTail(sb);

p(sb);

}

public static void p(Object o){

System.out.println(o);

}

}