StringBuilder類(lèi)有兩種方法可以清空數(shù)據(jù):
setLength(0)
方法將StringBuilder對(duì)象的長(zhǎng)度設(shè)置為0,這將清空字符序列中的所有數(shù)據(jù)。例如:StringBuilder sb = new StringBuilder("Hello World");
sb.setLength(0);
delete(0, sb.length())
方法刪除StringBuilder對(duì)象中的所有字符。例如:StringBuilder sb = new StringBuilder("Hello World");
sb.delete(0, sb.length());