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Chapter 25 The java.lang Package |
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Chapter 25 The java.lang Package |
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This class represents a string of characters. It differs from the String class in that its contents may be modified. A StringBuffer object grows in length as necessary. The string stored in a StringBuffer object may be modified in place with the setCharAt(), append(), and insert() methods.
After a string is processed in a StringBuffer object, it may be efficiently converted to a String object for subsequent use. The StringBuffer.toString() method does not copy the internal array of characters; instead it shares that array with the new String object, and makes a new copy for itself only when further modifications are made to the StringBuffer object.
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
}
ChoiceFormat.format(), DateFormat.format(), DecimalFormat.format(), Format.format(), MessageFormat.format(), NumberFormat.format(), SimpleDateFormat.format(), String()
ChoiceFormat.format(), DateFormat.format(), DecimalFormat.format(), Format.format(), MessageFormat.format(), NumberFormat.format(), SimpleDateFormat.format(), StringBuffer.append(), StringBuffer.insert(), StringBuffer.reverse(), StringWriter.getBuffer()
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| java.lang.String (JDK 1.0) |  |
java.lang.StringIndexOutOfBoundsException (JDK 1.0) |
