package guavaTest;

public class StringTest {

    public static void main(String[] args) {
        System.out.println("sCriptcom".replaceAll("(?i)script",""));

        System.out.println("SCriptcom".replaceAll("S(?i)cript",""));

        System.out.println("SCriptcom".replaceAll("s(?i)cript",""));

    }
}

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使用org.apache.commons.lang.WordUtils提供的方法，实现首字母大小写
最新的方法已经迁移到stringutils工具包中

String string = "TransactionService";
System.out.println(StringUtils.uncapitalize(string));