从对象流中读取对象,请在画线处加入代码完成此程序【 】。 import java.util.*; import ja
va.io.*; public class UnSerializeDate { Date d = null; UnSerializeDate() { try{ FileInputStream f = new FileInputStream("data.ser"); ______; d = (Date) s.readObject(); f.close(); } catch(Exception e) { e.printStackTrace(); } } public static void main(String args[ ]) { UnSerializeDate a = new UnSerializeDate(); System.out.println("The date read is :"+a.d.toString()); } }
dReader或Scanner读取文件。在这里,使用Scanner可能更容易。下面给出了一个示例Vehicles.txt文件。一行中的第一个单词是颜色,第二个单词是制造厂,第三个单词是型号,第四个单词是最大乘客数: red Ford F-150 3 siiver BMW 328i 4 blue GM bus 32 gold Chrys ler PTCruiser 4 orange WorldIndustries ProBoard 1
方值,将该数据及其平方值存入新的顺序文件NMtxt中。请填空。 Private Sub Form_Click() Dim x As Single,y As Single Open "NMl.txt" For Input As 1 Open "NMtxt" For Input As 2 Do While Not EOF(1) 【 】 Print x y=x^2 【 】 Print x Loop Close 1,2 End Sub
将该数据及其平方值存入新的顺序文件NM2.txt中。请填空。 Private Sub Form_Click() Dim x As Single,y As Single Open "NM1.txt" For Input As 1 Open "NM2.txt "For Input As 2 Do While Not EOF(1) 【 】 Print x y=x^2 【 】 Print y Loop Close 1, S2 End Sub