来源：互联网转载 | 更新日期：2023-09-09 22:26:57

2019独角兽企业重金招聘Python工程师标准>>>

1. StringBuilder sb2 = new StringBuilder(); 2. sb.delete( 0, sb.length() ); 3. sb3.setLength( 0 );

效率分别是2>3>1.

转载于:https://my.oschina.net/u/266531/blog/491294