替换掉下划线并让紧跟它后面的字母大写

public class StringUtil {

/**
* @param args
*/
public static void main(String[] args) {
System.out.println(replaceUnderlineAndfirstToUpper("ni_hao_abc","_",""));
}

/**
* 首字母大写
*
* @param srcStr
* @return
*/
public static String firstCharacterToUpper(String srcStr) {
return srcStr.substring(0, 1).toUpperCase() + srcStr.substring(1);
}
/**
* 替换字符串并让它的下一个字母为大写
* @param srcStr
* @param org
* @param ob
* @return
*/
public static String replaceUnderlineAndfirstToUpper(String srcStr,String org,String ob)
{
String newString = "";
int first=0;
while(srcStr.indexOf(org)!=-1)
{
first=srcStr.indexOf(org);
if(first!=srcStr.length())
{
newString=newString+srcStr.substring(0,first)+ob;
srcStr=srcStr.substring(first+org.length(),srcStr.length());
srcStr=firstCharacterToUpper(srcStr);
}
}
newString=newString+srcStr;
return newString;
}
}

import java.lang.*;

public class AAA{
public static void main(String args[])
{   //Java替换掉下划线并让紧跟它后面的字母大写
StringBuffer sb = new StringBuffer();
sb.append("asd_fgh_jkl");
int count = sb.indexOf("_");
while(count!=0){
int num = sb.indexOf("_",count);
count = num+1;
if(num!=-1){
char ss = sb.charAt(count);
char ia = (char) (ss - 32);
sb.replace(count,count+1,ia+"");
System.out.println(sb.toString());
}
}
String ss = sb.toString().replaceAll("_","");
System.out.println(ss+"--------------");
//JAVA去掉或替换指定子字符或空格等
//	    String str = "a b       c   d   e   f";
//	    String test = str.replaceAll("//s{1,}", "");
//	    System.out.println(test);
String str = "aaaaaaaaabbbbbbaaaaaaaa";
String test = str.replaceAll("b", "c");
System.out.println(test);

}
}