Java.io Package in JavaLast Updated : 26 Sep, 2023ReadDiscussCoursesJava.io Package in JavaThis package provides for system input and output through data streams, serialization and the file system. Unless otherwise noted, passing a null argument to a constructor or method in any class or interface in this package will cause a NullPointerException to be thrown.Following are the important classes in Java.io package:BufferedInputStreamBufferedOutputStreamBufferedReaderBufferedWriterByteArrayInputStreamByteArrayOutputStreamCharArrayReaderCharArrayWriter – Set1 Set2ConsoleDataInputStream – Set1 Set2DataOutputStreamFileFileDescriptorFileInputStreamFileOutputStreamFilePermissionFileReader and FileWriterFilterInputStreamFilterOutputStreamFilterReaderFilterWriterInputStreamInputStreamReaderLineNumberInputStreamLineNumberReaderObjectInputStream – Set1 Set2ObjectInputStream.GetFieldObjectOutputStream – Set 1 Set2ObjectOutputStream.PutFieldObjectStreamClassObjectStreamFieldOutputStreamOutputStreamWriterPipedInputStreamPipedOutputStreamPipedReaderPipedWriterPrintStream – Set1 Set2PrintWriter – Set1 Set2PushbackInputStreamPushbackReaderRandomAccessFile- Set1 Set2 Set3ReaderSequenceInputStreamSerializablePermissionStreamTokenizer – Set1 Set2StringBufferInputStreamStringReaderStringWriterWriterZipInputStream class in JavaZipEntry class in JavaJarEntry class in JavaZipOutputStream class in JavaZip.InflaterInputStream class in JavaZip.DeflaterInputStream class in JavaZip.DeflaterOutputStream class in Java