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import java.util.*;
public class RegexTest {
public static void main(String[] args) {
String str = "son cat java moon hahaha mmmm";
String[] dataArr = str.split(".on\\s*");
System.out.println(dataArr.length);
for (int i = 0; i < dataArr.length; i++) {
System.out.println(dataArr[i]);
}
}
}