[Chapter 31] 31.16 java.util.zip.ZipInputStream (JDK 1.1)

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| Chapter 31 The java.util.zip Package |

## 31.16 java.util.zip.ZipInputStream (JDK 1.1)

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This class is a subclass of `InflaterInputStream` that reads the entries of a ZIP file in sequential order. A `ZipInputStream` is created by specifying the `InputStream` from which it is to read the contents of the ZIP file. Once the `ZipInputStream` is created, the `getNextEntry()` method is used to begin reading of data from the next entry in the ZIP file. This method must be called before `read()` is called to begin reading of the first entry. Note that `getNextEntry()` returns a `ZipEntry` object that describes the entry being read. Also note that `getNextEntry()` returns `null` when there are no more entries to be read from the ZIP file.

The `read()` methods of `ZipInputStream` read until the end of the current entry and then return `-1` indicating that there are no more data to read. To continue with the next entry in the ZIP file, you must call `getNextEntry()` again. Similarly, the `skip()` method only skips bytes within the current entry. `closeEntry()` can be called to skip the remaining data in the current entry, but it is usually easier simply to call `getNextEntry()` to begin the next entry.

    public class ZipInputStream extends InflaterInputStream {
        // Public Constructor
                public ZipInputStream(InputStream in);
        // Public Instance Methods
                public void close() throws IOException;  // Overrides FilterInputStream
                public void closeEntry() throws IOException;
                public ZipEntry getNextEntry() throws IOException;
                public int read(byte[] b, int off, int len) throws IOException;  // Overrides InflaterInputStream
                public long skip(long n) throws IOException;  // Overrides InflaterInputStream
    }

### Hierarchy:

Object->InputStream->FilterInputStream->InflaterInputStream->ZipInputStream

java.util.zip.ZipFile (JDK 1.1) |  | java.util.zip.ZipOutputStream (JDK 1.1)