public final class StringBuffer extends Object implements Serializable {
    // Public Constructors
            public StringBuffer();
            public StringBuffer(int length);
            public StringBuffer(String str);
    // Public Instance Methods
            public synchronized StringBuffer append(Object obj);
            public synchronized StringBuffer append(String str);
            public synchronized StringBuffer append(char[] str);
            public synchronized StringBuffer append(char[] str, int offset, int len);
            public StringBuffer append(boolean b);
            public synchronized StringBuffer append(char c);
            public StringBuffer append(int i);
            public StringBuffer append(long l);
            public StringBuffer append(float f);
            public StringBuffer append(double d);
            public int capacity();
            public synchronized char charAt(int index);
            public synchronized void ensureCapacity(int minimumCapacity);
            public synchronized void getChars(int srcBegin, int srcEnd, char[] dst, int dstBegin);
            public synchronized StringBuffer insert(int offset, Object obj);
            public synchronized StringBuffer insert(int offset, String str);
            public synchronized StringBuffer insert(int offset, char[] str);
            public StringBuffer insert(int offset, boolean b);
            public synchronized StringBuffer insert(int offset, char c);
            public StringBuffer insert(int offset, int i);
            public StringBuffer insert(int offset, long l);
            public StringBuffer insert(int offset, float f);
            public StringBuffer insert(int offset, double d);
            public int length();
            public synchronized StringBuffer reverse();
            public synchronized void setCharAt(int index, char ch);
            public synchronized void setLength(int newLength);
            public String toString();  // Overrides Object
}

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