匹配Java中所有出现的正则表达式
public class RegexOccur {
public static void main(String args[]) {
String str = "java is fun so learn java";
String findStr = "java";
int lastIndex = 0;
int count = 0;
while(lastIndex != -1) {
lastIndex = str.indexOf(findStr,lastIndex);
if(lastIndex != -1) {
count ++;
lastIndex += findStr.length();
}
}
System.out.println(count);
}
}输出结果
2