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IO stream_ Overview and explanation of data input and output flow

2022-07-27 11:06:00 【51CTO】
       
       package 
       
       cn.
       
       itcast_01;
       
       import 
       
       java.
       
       io.
       
       DataInputStream;
       
       import 
       
       java.
       
       io.
       
       DataOutputStream;
       
       import 
       
       java.
       
       io.
       
       FileInputStream;
       
       import 
       
       java.
       
       io.
       
       FileOutputStream;
       
       import 
       
       java.
       
       io.
       
       IOException;
       
       /*
       
       *  You can read and write data of basic data types 
       
       *  Data input stream :DataInputStream
       
       * DataInputStream(InputStream in)
       
       *  Data output stream :DataOutputStream
       
       * DataOutputStream(OutputStream out) 
       
       */
       
       public 
       
       class 
       
       DataStreamDemo {
       
       public 
       
       static 
       
       void 
       
       main(
       
       String[] 
       
       args) 
       
       throws 
       
       IOException {
       
       //  Write 
       
       // write();
       
       //  read 
       
       read();
       
  }
       
       public 
       
       static 
       
       void 
       
       read() 
       
       throws 
       
       IOException {
       
       // DataInputStream(InputStream in)
       
       //  Create a data input stream object 
       
       DataInputStream 
       
       dis 
       
       = 
       
       new 
       
       DataInputStream(
       
       new 
       
       FileInputStream(
       
       "dos.txt"));
       
       //  Reading data 
       
       byte 
       
       b 
       
       = 
       
       dis.
       
       readByte();
       
       short 
       
       s 
       
       = 
       
       dis.
       
       readShort();
       
       int 
       
       i 
       
       = 
       
       dis.
       
       readInt();
       
       long 
       
       l 
       
       = 
       
       dis.
       
       readLong();
       
       float 
       
       f 
       
       = 
       
       dis.
       
       readFloat();
       
       double 
       
       d 
       
       = 
       
       dis.
       
       readDouble();
       
       boolean 
       
       bb 
       
       = 
       
       dis.
       
       readBoolean();
       
       char 
       
       c 
       
       = 
       
       dis.
       
       readChar();
       
       //  Release resources 
       
       dis.
       
       close();
       
       System.
       
       out.
       
       println(
       
       b);
       
       System.
       
       out.
       
       println(
       
       s);
       
       System.
       
       out.
       
       println(
       
       i);
       
       System.
       
       out.
       
       println(
       
       l);
       
       System.
       
       out.
       
       println(
       
       f);
       
       System.
       
       out.
       
       println(
       
       d);
       
       System.
       
       out.
       
       println(
       
       bb);
       
       System.
       
       out.
       
       println(
       
       c);
       
  }
       
       public 
       
       static 
       
       void 
       
       write() 
       
       throws 
       
       IOException {
       
       // DataOutputStream(OutputStream out)
       
       //  Create a data output stream object 
       
       DataOutputStream 
       
       dos 
       
       = 
       
       new 
       
       DataOutputStream(
       
       new 
       
       FileOutputStream(
       
       "dos.txt"));
       
       //  Write data 
       
       dos.
       
       writeByte(
       
       10);
       
       dos.
       
       writeShort(
       
       100);
       
       dos.
       
       writeInt(
       
       1000);
       
       dos.
       
       writeLong(
       
       10000);
       
       dos.
       
       writeFloat(
       
       12.5F);
       
       dos.
       
       writeDouble(
       
       15.23);
       
       dos.
       
       writeBoolean(
       
       true);
       
       dos.
       
       writeChar(
       
       'a');
       
       //  Release resources 
       
       dos.
       
       close();
       
  }
       
}
      
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本文为[51CTO]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/208/202207271029380002.html
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IO stream_ Overview and explanation of data input and output flow

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