看看错出在哪里
我要替换str里的str2,换成str3里的词， 为什么我的程序会瘫痪呢？ public String replaceSubstring()
{
StringBuilder str=new StringBuilder(line);
String str2="the";
String str3="that";
int position;
position = str.indexOf(str2);
str.replace(position,position+str2.length(), str3);
while (position !=-1)
{
position = str.indexOf(str2, position+1);
str.replace(position,position+str2.length(), str3);
}
return str.toString();
}
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程序代码：
String str="the aaga asgagathe";
String str2="the";
String str3="that";
str=str.replace(str2, str3);
System.out.println(str);
String str2="the";
String str3="that";
str=str.replace(str2, str3);
System.out.println(str);
----------------解决方案--------------------------------------------------------
以下是引用jedypjd在2009-10-28 09:51:08的发言：
String str="the aaga asgagathe";
String str2="the";
String str3="that";
str=str.replace(str2, str3);
System.out.printl ...
这种方法是很简单,但是要求是不可以用这个方法, 需要用我的方法,大家帮我改一下我的程序 String str="the aaga asgagathe";
String str2="the";
String str3="that";
str=str.replace(str2, str3);
System.out.printl ...
----------------解决方案--------------------------------------------------------
//自己去总结吧。
import java.lang.StringBuilder;
class replace1{
public String replaceSubstring()
{
StringBuilder str=new StringBuilder("cat is cat");
String str2="cat";
String str3="dog";
int position;
position = str.indexOf(str2);
str.replace(position,position+str2.length(), str3);
while (position !=-1)
{
position = str.indexOf(str2, position+1);
if(position==-1){
break;
}else{
str.replace(position,position+str2.length(), str3);
}
}
return str.toString();
}
}
public class Dancitihuan {
public static void main(String[] args) {
replace1 re=new replace1();
System.out.println(re.replaceSubstring());
}
}
----------------解决方案--------------------------------------------------------
楼主，你是要转换“the”单词还是字符，如果是前者就要用正则表达式“\\bthe\\b”，因为很多英文单词里都包含"the"字符串, 如"weather"
----------------解决方案--------------------------------------------------------