/**
 * @20165213zqh
 */
public class CodeStandard{
    public static void main(String[] args) {
        StringBuffer buffer = new StringBuffer();
        buffer.append('S');
        int j=20;
        buffer.append("tringBuffer");
        System.out.println(buffer.charAt(1));
        System.out.println(buffer.capacity());
        System.out.println(buffer.indexOf("tring"));
        System.out.println("buffer = " + buffer.toString());
        if (buffer.capacity() < j) {
            buffer.append("1234567");
        }
        for (int i = 0; i < buffer.length(); i++) {
            System.out.println(buffer.charAt(i));
        }
    }
}