removeAll 疑問(wèn)
// Course[] cr3 = {new Course("3","離散數(shù)學(xué)"),new Course("4","JAVA語(yǔ)言")}; Course[] cr3 = {(Course) coursesToSelect.get(3),(Course) coursesToSelect.get(5)}; coursesToSelect.removeAll(Arrays.asList(cr3)); 請(qǐng)問(wèn)下用上面一行的方式刪除為什么不能刪除成功？？？謝謝!
2017-09-01
把第一個(gè)定義語(yǔ)句去掉，如果coursesToSelect長(zhǎng)度足夠長(zhǎng)，后面兩句語(yǔ)句就可以實(shí)現(xiàn)功能了