CREATE TABLE PAIR (LEFT VARCHAR(10)， RIGHT VARCHAR(10)) ;

and this procedure definition:

CREATE PROCEDURE STORE_ PAIR (GOLD IN VARCHAR, BLUE IN 

VARCHAR) AS

BEGIN

INSERT INTO PAIR(LEFT, righT) VALUES (BLUE, GOLD. ;

END;

and this method:

void storePair (Connection conn) throws SQLException {

CallableStatement cStmt = conn. prepareCall ("{cal1l STORE_ PAIR(?， ?) }") ;

cStmt. setObject ("blue", "one", JDBCType . VARCHAR) ;

cStmt. setObject ("gold", "two", JDBCTyPe . VARCHAR) ;

cStmt . execute () ;

}

编译和执行该方法的结果是什么?  

public static void main(String[] args) {

string source = "/u01/ work/ stage/message. txt";

String destination =”/u01/ work/message. txt";

// line 1

} catch (IOException e) {

e. printStackTrace () ;

}

You want to move source. txt to the destination directory even if a file with the same 

name already

exists in the destination directory.

插入到第1行中的哪段代码可以完成这个任务?  

public class Main {

public static void main(String[] args) {

List<Integer> list = new CopyOnWriteArrayList<>() ;

ExecutorService executorService = Executors. newFixedThreadPool (5) ;

CyclicBarrier barrier = new CyclicBarrier(2, () -> System.out.print (list));

IntStream. range(0, 5) . forEach(n -> executorService. execute( () ->

{ try {

list.add(n) ;

barrier.await() ;

} catch (InterruptedException | BrokenBarrierException e) {

System. out.println("Exception") ;

}

})) ;

executorService . shutdown() ;

 }

}

哪个说法是正确的?

int i=3;

int j=25;

System.out.println(i >2 ? i >10 ? i *(j+10) : i * j + 5 : i );

结果如何?

Automobile.java

public abstract class Automobile { //line 1

abstract void wheels() ;

}

Car.java

public class Car extends Automobile {

// line 2

void wheels (int i) { // line 3

System. out.print (4) ;

}

public static void main(String[] args) {

Automobile ob = new Car() ; // line 4

ob.wheels() ;

}

你必须做什么才能打印出代码4?

关于Fox类，哪一种说法是正确的？

List<Integer> myList = Arrays.asList(9,8,9,2,7,2) ;

哪个语句打印2789?

public class Over{

public void analyze(Object[] o){

System.out.println("I am an object array");

}

public void analyze(long[] l){

System.out.println("I am an array");

}

public void analyze(Object o){

System.out.println("I am an object");

}

public static void main(String[] args){

int[] nums=new int[10];

new Over().analyze(nums);

}

}

public class Test{

static int i=6;

public static void main(String[] args){

int i=5;

Function myAddr=x->{return (Integer)x+i;}

printValue(myAddr,3);

System.out.println(myAddr.apply(3));

}

public static void printValue(Function f,int num){

int i=7;

System.out.println(f.apply(num));

}

}

what is the result?

interface OrderService{

default void place(int numItems,int minItems){}

private void verify(int minItems){

System.out.println("Verified");

}

}

and

public class Order implements OrderService{

public static void main(String[] args){

Order order=new Order();

order.place(10,5);

}

}

您必须执行哪些操作才能打印Verified?  

public static X createX(double amount){

return new X(amount);

}

public double amount;

private X(double amount){

this.amount=amount;

}

public String toString(){

return String.valueof(amount);

}

}

and

public final class Main{

public static void main(String[] args){

X x=X.createX(100.0);

x.amount=500.0;

System.out.println(x);

}

}

结果如何?

public Iterable a();

}

public interface B extends A{

public Collection a();

}

public interface C extends A{

public Path a();

}

public interface D extends B,C{

}

为什么D会导致编译错误?

public class DoClass{

static String s;

public static void main(String[] args){

switch(s){

case "41": s+="41";

default: : s+=" def ";

case "42": s+="42";

}

System.out.println(s);

}

}

输出是什么?

int sum=numbers.stream().reduce(0,(n,m)->n+m); //line 1

你想让还原操作并行化,哪两个修改将实现这一点?  

public void checkValue(Object value)throws IllegalArgumentException; //line 2

public boolean isValueANumber(Object val){

if(val instanceof Number){

return true;

}else{

try{

Double.parseDouble(val.toString());

return true;

}catch(NumberFormatException ex){

return false;

}

}

}

}

需要做哪两个更改才能编译这个类?  

List books=List.of(new Book("Goodbye to childhood",19.99),

new Book("Farewell to the Land",35.00),

new Book("City Life",17.45));

哪两条语句将被编译?