Java Programming by Pearson

String and String Buffer • 277

For example, if sbuf refers to a string buffer object whose contents are ‘ jul ’, then the method class

sbuf.append( ‘ le ’ ) would cause the string buffer to contain ‘ julle ’, whereas sbuf.insert(1 ,

‘ le ’ ) would alter the string buffer to contain ‘ jleul ’ .

In general, if sb refers to an instance of a StringBuffer, sb.append(x) has the same effect as sb.

insert(sb.length(), x).

Every string buffer has a capacity. As long as the length of the character sequence contained in the

string buffer does not exceed the capacity, it is not necessary to allocate a new internal buffer array. If the

internal buf ...