ex060204.java

我在学习JAVA的讲义

 public class Ex060204{
 	static String replace(String str, String str1, String str2){
 		int i=-1;
 		String result="";
 		while((i=str.indexOf(str1))>=0){
 			result=result+str.substring(0,i);
 			result=result+str2;
 			str=str.substring(i+str1.length());
 		}
 		result+=str;
 		return result;
 	}
	public static void main(String[] args){
		String str="abccba";
		System.out.println(str+"  "+replace(str,"a","123"));
	}
}