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public static void main(String[] args) { String aString="w14-rq22.3"; //只保留数字 aString = aString.replaceAll("[^(0-9)]",""); System.out.println(aString) 阅读全文
posted @ 2020-06-21 14:02
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摘要:
public static void main(String[] args) { double a = 0; double b = 11.0; System.out.println(String.format("%.2f", a)); System.out.println(String.format 阅读全文
posted @ 2020-06-21 13:43
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