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public static void main(String[] args) throws Exception { String number = "1000500000"; double amount = Double.parseDouble(number); DecimalFormat intFormatter = new DecimalFormat("#,###"); DecimalFormat floatFormatter = new DecimalFormat("#,###.00"); System.out.println("==int=="); System.out.println(intFormatter.format(amount)); System.out.println(String.format("%,d", Integer.parseInt((number)))); System.out.println(number.replaceAll("(\\d)(?=(\\d{3})+$)", "$1,")); System.out.println("==float=="); System.out.println(floatFormatter.format(amount)); System.out.println(String.format("%,.2f", Float.parseFloat((number)))); } ==int== 1,000,500,000 1,000,500,000 1,000,500,000 ==float== 1,000,500,000.00 1,000,499,968.00 |
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