6.3substring.java

JAVA程序设计的源代码

class SubString{
public static void main(String args[])
{
String org="This is a test. This is,too.";
String search="is";
String sub="was";
String result="";
int i;
do{
System.out.println(org);
i=org.indexOf(search);   //获取与查找子串相同的位置索引
if(i!=-1){
result=org.substring(0,i);      //添加索引之前的子串
result=result+sub;    //添加替换的子串
result=result+org.substring(i+search.length());    //补齐字符串
org=result;
}
}while(i!=-1);
}
}