我正在尝试使用方法写入大于 256 的值DataOupPutStream.write()
。当我尝试使用它读取相同的值DataInputStream.read()
时,它将返回 0。因此,我使用DataOutputStream.writeInt()
和DataInputStream.readInt()
方法来写入和检索大于 256 的值,它工作正常。
请参阅下面的代码片段,我想知道编译器在语句in.readInt()
内部的行为。while
FileOutputStream fout = new FileOutputStream("T.txt");
BufferedOutputStream buffOut = new BufferedOutputStream(fout);
DataOutputStream out = new DataOutputStream(fout);
Integer output = 0;
out.writeInt(257);
out.writeInt(2);
out.writeInt(2123);
out.writeInt(223);
out.writeInt(2132);
out.close();
FileInputStream fin = new FileInputStream("T.txt");
DataInputStream in = new DataInputStream(fin);
while ((output = in.readInt()) > 0) {
System.out.println(output);
}
我运行此代码段时的输出是:
Exception in thread "main" java.io.EOFException
at java.io.DataInputStream.readInt(Unknown Source)
at compress.DataIOStream.main(DataIOStream.java:34)
257
2
2123
223
2132
但是当我在调试模式下运行时,我得到以下输出:
2123
223
2132
Exception in thread "main" java.io.EOFException
at java.io.DataInputStream.readInt(Unknown Source)
at compress.DataIOStream.main(DataIOStream.java:34)