#NumberFormat

Java的NumberFormat格式化数字

packagelearning;importjava.text.NumberFormat;importjava.util.Locale;publicclassNumberFormatTest{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstu...

hadoop ha环境下的datanode启动报错java.lang.NumberFormatException: For input string: "10m"

hadoopha环境启动start-dfs.sh的时候datanode启动不了,并且报错。[hadoop@datanode2~]$cat/home/hadoop/hadoop-2.7.3/logs/hadoop-hadoop-datanode-datanode2.log2019-03-2418:40:46,422FAT...

Caused by: java.lang.NumberFormatException: For input string: "18446744073709551615"

问题:Causedby:java.lang.NumberFormatException:Forinputstring:"18446744073709551615"原因:18446744073709551615 --有20位,而long类型的最大长度是:19位:9223372036854775807long类型...

吴裕雄--天生自然java开发常用类库学习笔记:NumberFormat

importjava.text.*;publicclassNumberFormatDemo01{publicstaticvoidmain(Stringargs[]){NumberFormatnf=null;//声明一个NumberFormat对象nf=NumberFormat.getInstance();//得到默认的...