Java中截取字符串中小数点前面的字符

• 通过下标获取

String number = "2563.2154";

int index = number.indexOf(".");

String intNumber = number.substring(0,index);

System.out.println("测试1："+intNumber); 

• 截取字符串的方式

String number = "2563.2154";

System.out.println("测试2："+number.split("\\.")[0]);