Double 類型數據保留2位小數

    public static void main(String[] args) {
        double test1=10.2234;
        double test2=10.3356;
 
        Double dtest1 = Double.valueOf(String.format("%.2f", test1 ));
 
        Double dtest2 = Double.valueOf(String.format("%.2f", test2 ));
 
        System.out.println(dtest1 );
        System.out.println(dtest2 );
    }