StringBuffer用法
1 public class StringBufferTest { 2 public static void main(String[] args) { 3 StringBuffer sb=new StringBuffer(); 4 sb.append("aaa"); 5 sb.append("bbb"); 6 sb.append(123); 7 sb.append(false); 8 sb.insert(3, "tt"); 9 sb.insert(3,true); 10 System.out.println(sb.toString()); 11 } 12 }