請(qǐng)問(wèn)這是什么情況呢，我用的是IDEA
代碼我都看過(guò)了沒(méi)問(wèn)題啊
xiaoqing5
2019-10-15
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2020-08-17
testEntrySet應(yīng)該這樣寫(xiě)
2019-10-16
你少了一行代碼foreach循環(huán)
public?void?testEntrySet() { Set<Entry<String,Student>>entrySet=students.entrySet(); for?(Entry<String,?Student>?entry?:?entrySet)? { System.out.println("取得鍵值"+entry.getKey()); System.out.println("對(duì)應(yīng)的值為："+entry.getValue().id); } }