Question

I try to put some strings to CharBuffer with CharBuffer.put() function
but the buffer is left blank.

my code:

CharBuffer charBuf = CharBuffer.allocate(1000);
for (int i = 0; i < 10; i++) 
{
    String text = "testing" + i + "\n";
    charBuf.put(text);
}
System.out.println(charBuf);

I tried to use with clear() or rewind() after allocate(1000) but that did not change the result.

Answer 1

You must rewind it after you put in the objects, try this

CharBuffer charBuf = CharBuffer.allocate(1000);
for (int i = 0; i < 10; i++) 
{
    String text = "testing" + i + "\n";
    charBuf.put(text);
}
charBuf.rewind();
System.out.println(charBuf);