9.2
メソッドの詳細
<この節の構成>
9.2.1 debug
9.2.2 error
9.2.3 info
9.2.4 isDebugEnabled
9.2.5 isErrorEnabled
9.2.6 isInfoEnabled
9.2.7 isTraceEnabled
9.2.8 isWarnEnabled
9.2.9 trace
9.2.10 warn