使用全面的 Oracle 1Z0-809 考試問題和答案通過考試，Java SE 8 程序員 II | SPOTO

給出： public class product { int id; int price; public Product (int id, int price) { this.id = id; this.price = price; } public String toString() { return id + ":" + price; }} 以及代碼片段：List products = Arrays.asList(new Product(1, 10), new Product (2, 30), new Product (2, 30)); Product p = products.stream().reduce(new Product (4, 0), (p1, p2) -> { p1.price+=p2.price; return new Product (p1.id, p1.price);}); products.add(p); products.stream().parallel().reduce((p1, p2) -> p1.price >); products.add(p); products.stream().parallel().reduce((p1, p2) -> p1.price >)

給出代碼片段： public static void main (String[] args) throws IOException { BufferedReader brCopy = null; try (BufferedReader br = new BufferedReader (new FileReader("employee.txt"))){ // 行 n1 br.lines().forEach(c -> System.out.println(c)); brCopy = br; // 行 n2 } brCopy.ready(); // 行 n3; }假設在一個已關閉的 BufferedReader 上調用 BufferedReader 的 ready 方法會拋出異常，而 employee.txt 是可以訪問的，並且包含有效文本。結果如何？

put (7, "e"); unsortMap.put (50, "j"); Map treeMap = new TreeMap (new Comparator ( ) { @Override public int compare (Integer o1, Integer o2) {return o2.compareTo (o1); } }.}); treeMap.putAll (unsortMap); for (Map.Entry entry : t)

給出學生表的結構：學生（id INTEGER，name VARCHAR 給出了 STUDENT 表中的記錄：給出代碼片段：假設在類路徑中配置了所需的數據庫驅動程序。可以使用 dbURL、userName 和 passWord 訪問相應的數據庫。結果如何？

給出代碼片段：BiFunction val = (t1, t2) -> t1 + t2; //line n1 System.out.println(val.apply(10, 10.5)); 結果如何？

關於 DriverManager 類，哪種說法是正確的？

加載 JDBC 3.0 驅動程序需要哪個代碼片段？

給定：項目表 ?id，整數：pk ?descrip, varchar(100) ?PRICE, REAL ?QUANTITY< INTEGER 並給出代碼片段： 9. try { 10.Connection conn = DriveManager.getConnection(dbURL, username, password); 11. String query = "Select * FROM Item WHERE ID = 110"; 12. Statement stmt = conn.createStatement(); 13. ResultSet rs = stmt.executeQuery(query); 14. while(rs.next()) { 15.System.out.println("ID: " + rs.getInt("Id")); 16.System.out.println("Description：" + rs.getString("Descrip")); 17.17. System.out.println("Description: " + rs.getString("Descrip"))

和代碼片段？結果如何？

Given: public class Customer { private String fName; private String lName; private static int count; public customer (String first, String last) {fName = first, lName = last; ++count;} static { count = 0; } public static int getCount() {return count; }} public class App { public static void main (String [] args) { 客戶 c1 = 新客戶（"Larry"，"Smith"）; 客戶 c2 = 新客戶（"Pedro"，"Gonzales"）; 客戶 c3 = 新客戶（"Penny"，"Jones"）; 客戶 c4 = 新客戶（"Lars"，"Svenson"）; c4 = nu

給出： 和命令： java Product 0 結果如何？

給出以下代碼片段： public class Book implements Comparator { String name; double price; public Book () {} public Book(String name, double price) { this.name = name; this.price = price; } public int compare(Book b1, Book b2) { return b1.name.compareTo(b2.name); } public String toString() { return name + ":" + price; } 和} and Listbooks = Arrays.asList (new Book ("Beginning with Java", 2), new book ("A Guide to Java Tour", 3)); Collections.sort(books, new Book()); System.out.print(books); Wha

給定： class Vehicle { int vno; String name; public Vehicle (int vno, String name) { this.vno = vno,; this.name = name; } public String toString () { return vno + ":" + name; }} 以及此代碼片段：Set vehicles = new TreeSet <> (); vehicles.add(new Vehicle (10123, "Ford")); vehicles.add(new Vehicle (10124, "BMW")); System.out.println(vehicles); 結果如何？

給定：您可以使用哪兩個接口來創建 lambda 表達式？(請選擇兩個）。

哪個類的定義可以編譯？