- scanner nextint()
- Random nextint(X)
- Math ceil() floor() round() abs()
- arrays tostring() sort()
- System currentTimeMillis() coyarrsy
- date gettime() settime()
- simpledateformate format() parse()
- calendar get(calendar.year) set(calendar.year,2014) getTime() getInstance(****,****) add(calendar.year,1)
- string indexof() concat() equals() length() charAt() substring() split() reaplace() toCharArray() getBytes()
- stringbuilder
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