datainout.java

180个针对Java初学者的简单实例,包含了180個適合與初學者的源碼實例

import java.io.*;
class DataInOut{
  public static void main(String args[])
    throws IOException {
	//创建DataOutputStream对象，并向文件中写入数据。
    FileOutputStream fout = new FileOutputStream("test11_4.txt");
    DataOutputStream Dataout = new DataOutputStream(fout);
    Dataout.writeDouble(38.79);
    Dataout.writeInt(200);
    Dataout.writeBoolean(true);
    Dataout.close();
	//创建DataInputStream对象，从文件中读取数据并输出。
    FileInputStream fin = new FileInputStream("test11_4.txt");
    DataInputStream Datain = new DataInputStream(fin);
    double d = Datain.readDouble();
    int i = Datain.readInt();
    boolean b = Datain.readBoolean();
    System.out.println("Input Number are :  " +
                       d + " " + i + " " + b);
    Datain.close();
  }
}