2018-12-19 java int long 的最大值是多少

    public static void main(String[] args) {

        BigDecimal lll = new BigDecimal("9999999999999999999999999999");

        System.out.println(Long.MAX_VALUE);
        System.out.println(BigDecimal.valueOf(2).pow(63));
        
        System.out.println(Integer.MAX_VALUE);
        System.out.println(BigDecimal.valueOf(2).pow(31));

        System.out.println(lll);
    }

9223372036854775807
9223372036854775808
2147483647
2147483648
9999999999999999999999999999