package java.io; import org.checkerframework.checker.nullness.qual.Nullable; public abstract class Writer implements Appendable, Closeable, Flushable { protected Writer() {} public void write(int a1) throws IOException { throw new RuntimeException("skeleton method"); } public void write(char[] a1) throws IOException { throw new RuntimeException("skeleton method"); } public abstract void write(char[] a1, int a2, int a3) throws IOException; public void write(String a1) throws IOException { throw new RuntimeException("skeleton method"); } public void write(String a1, int a2, int a3) throws IOException { throw new RuntimeException("skeleton method"); } public Writer append(@Nullable CharSequence a1) throws IOException { throw new RuntimeException("skeleton method"); } public Writer append(@Nullable CharSequence a1, int a2, int a3) throws IOException { throw new RuntimeException("skeleton method"); } public Writer append(char a1) throws IOException { throw new RuntimeException("skeleton method"); } public abstract void flush() throws IOException; public abstract void close() throws IOException; }