//Sample_replaceAll.java
class Sample_replaceAll{
    public static void main(String[] args){
        String str1 = "いたちまさむねいたちじゃない";
        String regex = "いたち";
        String replacement = "だて";
        String str2 = str1.replaceAll(regex, replacement);
        System.out.println("str1 = " + str1);
        System.out.println("str2 = " + str2);

    }
}