现在成这样了 Exception in thread "main" java.lang.NullPointerException at java.util.regex.Matcher.getTextLength(Matcher.java:758) at java.util.regex.Matcher.find(Matcher.java:414) at java.util.regex.Pattern.split(Pattern.java:937) at java.util.regex.Pattern.split(Pattern.java:996) at mydraw.main(mydraw.java:112)
只有存在main方法的.java文件才能用java执行
有的话那么检查你的main中调用的方法,看是不是有的忘记判断null操作了!
也就是你还没正确地进行初始化
Exception in thread "main" java.lang.NullPointerException
at java.util.regex.Matcher.getTextLength(Matcher.java:758)
at java.util.regex.Matcher.find(Matcher.java:414)
at java.util.regex.Pattern.split(Pattern.java:937)
at java.util.regex.Pattern.split(Pattern.java:996)
at mydraw.main(mydraw.java:112)