题目内容

//把几个JAVA类型的数据写到一个文件，并读取出来。importjava.io.*;publicclassDataInAndOutStream{publicstaticvoidmain(String args[]){try{ FileOutputStream fos=newFileOutputStream("DataOut.dat");(1)out_data.writeInt(156);out_data.writeLong(987654L);out_data.writeFloat(3.14f);out_data.writeDouble(92521.14);out_data.writeBoolean(true);out_data.writeUTF("JAVA语言真奇妙！");out_data.writeByte(123);out_data.writeChars("I am ok");}catch(IOException e){}try{ (2)DataInputStream in_data=newDataInputStream(fis);(3)//读取long整数System.out.println(":"+in_data.readLong());//读取第1个float数System.out.println(":"+in_data.readFloat());//读取第1个double数System.out.println(":"+_(4) );//读取第1个boolean值System.out.println(":"+in_data.readBoolean());//读取第1个UTF值System.out.println(":"+in_data.readUTF());//读取第1个Byte数System.out.println(":"+in_data.readByte());charc;while((5)_) //'\0'表示空字符System.out.print(c);}catch(IOException e){}}}

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