1. StringBuilder sb2 = new StringBuilder();
2. sb.delete( 0, sb.length() );
3. sb3.setLength( 0 );
1. StringBuilder sb2 = new StringBuilder();
2. sb.delete( 0, sb.length() );
3. sb3.setLength( 0 );
转载于:https://my.oschina.net/u/266531/blog/491294