Most efficient way to convert a single char to a CharSequence

Question

What's the most efficient way to pass a single char to a method expecting a CharSequence?

This is what I've got:

textView.setText(new String(new char[] {c} )); 

According to the answers given here, this is a sensible way of doing it where the input is a character array. I was wondering if there was a sneaky shortcut I could apply in the single-char case.

Answer 1

textView.setText(String.valueOf(c)) 

Answer 2

Looking at the implementation of the Character.toString(char c) method reveals that they use almost the same code you use:

  public String toString() {        char buf[] = {value};        return String.valueOf(buf);   } 

For readability, you should just use Character.toString( c ).

Another efficient way would probably be

new StringBuilder(1).append(c); 

It's definitely more efficient that using the + operator because, according to the javadoc:

The Java language provides special support for the string concatenation operator ( + ), and for conversion of other objects to strings. String concatenation is implemented through the StringBuilder(or StringBuffer) class and its append method