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fileAccess(fileAccess: boolean)
B:javaScriptAccess(javaScriptAccess: boolean)
C:on(type: ‘headerReceive’, callback: AsyncCallback): void
D:onConfirm(callback: (event?: { url: string; message: string; result: JsResult }) => boolean)
E:destroy(): void
boolean add(E e);
B:boolean add(int index);
C:boolean put(int index);
D:boolean put(E e);
public static void main
B:public static void main(String] args)
C:public static int main(String] args)
D:public void main(String args])
getRealPath(String path)
B:getResource(String path)
C:getResourcePaths(String path)
D:getResourceAsStream(String path)
}
}
选项: A:错误:方法参数与变量不匹配
B:20 and 40
C:10 and 40
D:10 and 20
">5.以下代码的输出结果为( )。public class Pass{
static int j = 20;
public void amethod(int x){
x = x*2;
j = j*2;
}
public static void main(String args]){
int i = 10;
Pass p = new Pass();
p.amethod(i);
System.out.println(i+" and "+j);
}
}
选项: A:错误:方法参数与变量不匹配
B:20 and 40
C:10 and 40
D:10 and 20
public void methodTwo(int i){}
C:public static void methodTree(int i, int j){}
D:blic static void methodFour(int i){}
">6.以下哪个方法不可以加入类 Son? ( )
class Father{
public void methodOne(int i){}
public void methodTwo(int i){}
public static void methodTree(int i){}
public static void methodFour(int i){}
}
class Son extends Father{…}
选项: A:public static void methodOne(int i){}
B:public void methodTwo(int i){}
C:public static void methodTree(int i, int j){}
D:blic static void methodFour(int i){}
void getValue(String name)
B:void getAttribute(Object name)
C:void getAttribute(String name)
D:Object getAttribute(String name)
int indexOf(int ch)
B:int lastIndexOf(int ch)
C:int indexOf(String str)
D:int indexOf(String str)
A、int indexOf(int ch)
B:B、int lastIndexOf(int ch)
C、int indexOf(String str)
D:D、int lastIndexOf(String str)
A、Name
B、name
C、age
D、SaySomething
int indexOf(int ch)
B:int lastIndexOf(int ch)
C:int indexOf(String str)
D:D、int lastIndexOf(String str)
}
}
public class Main {
public (1分) main(String] args) {
Scanner input = new Scanner(System.in);
int w = input.nextInt();
int h = input.nextInt();
int l = input.nextInt();
Box box1 = (1分)
System.out.println(box1.toString());
box1.setWidth(5);
box1.setFull((1分));
System.out.println(box1.toString());
}
}
">12.设计并实现Box类,它包含盒子的高度、宽带和深度的实例数据:还包含布尔变量full这个实例数据,变量full表示盒子是否满了。所有数据都定义为私有。定义Box构造函数接收并初始化盒子的高度、宽带和深度。每次新创建的Box都为空,构造函数将full初始化为假。该类所有实例都有getter和setter方法;该类还包含了一个计算盒子体积的方法。
(1分)
class (1分) {
private boolean (1分);
private int width;
private int height;
private int lenght;
public Box((1分)) {
full = false;
this.width = width;
this.height = height;
this.lenght = lenght;
}
public (1分) isFull() {
return full;
}
public void setFull(boolean full) {
this.full = full;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeight() {
return height;
}
public void setHeight(int h) {
this.height = height;
}
public int getLenght() {
return lenght;
}
public void setLenght(int lenght) {
this.lenght = lenght;
}
public int getVolumn() {
(1分)
}
@Override
public String (1分) {
return "Box is " + (full ? "full" : "empty") + ", The Volumn is " + getVolumn();
}
}
public class Main {
public (1分) main(String] args) {
Scanner input = new Scanner(System.in);
int w = input.nextInt();
int h = input.nextInt();
int l = input.nextInt();
Box box1 = (1分)
System.out.println(box1.toString());
box1.setWidth(5);
box1.setFull((1分));
System.out.println(box1.toString());
}
}
}
}
">13.interface Com {int add(int a, int b);
public static int get(int n){
return n;
}
public default int see(int n){
return n;
}
public default int look(int n){
return n;
}
}
class A implements Com{
public int add(int a, int b){
return a+b;
}
public int see(int n){
return n+1;
}
}
public class E {
public static void main(String args]){
A a = new A();
int m = a.add(12,6);
int n =Com.get(12);
int t = a.see(6);
int q = a.look(6);
System.out.printf("%d:%d:%d:%d",m,n,t,q);
}
}
String
B:short
C:boolean
D:char
}
}
">15.14、请说出下面中【代码】的输出结果
interface Com {
int add(int a,int b);
public static int get(int n){
return n;
}
public default int see(int n){
return n;
}
public default int look(int n){
return n;
}
}
class A implements Com{
public int add(int a,int b) {
return a+b;
}
public int see(int n){
return n+1;
}
}
public class Main {
public static void main(String args]) {
A a = new A();
int m = a.add(12,6);
int n =Com.get(12);
int t = a.see(6);
int q = a.look(6);
System.out.printf("%d:%d:%d:%d",m,n,t,q); //【代码】
}
}
}
}
">16.请说出下面中【代码】的输出结果
interface Com {
int add(int a,int b);
public static int get(int n){
return n;
}
public default int see(int n){
return n;
}
public default int look(int n){
return n;
}
}
class A implements Com{
public int add(int a,int b) {
return a+b;
}
public int see(int n){
return n+1;
}
}
public class Main {
public static void main(String args]) {
A a = new A();
int m = a.add(12,6);
int n =Com.get(12);
int t = a.see(6);
int q = a.look(6);
System.out.printf("%d:%d:%d:%d",m,n,t,q); //【代码】
}
}
Byte]a= "abcd" . getBytes();
Try{ FileOutputStream out = new FileOutputStream(f);
Out.write(a);
Out.close();
FileInputStream in = new FileInputStream(f);
Byte] tom= new byte 3];
Int m= in. read(tom, 0,3);
System. out. println(m);//【代码1】
String s = new String(tom, 0, 3);
System. out. println(s); //代码2】
M= in.read(tom, 0, 3);
System. out. println(m);//代码3】
S = new String( tom, 0,3);
System. out. println(s);//【代码4】
Catch( IOException e){}
}
}
">17.请说出E类中标注的【代码1】~【代码4】的输出结果。Import java.io. *;
Public class E{
Public static void main(String args ]){
Int n= - 1;
File f = new File( " hello.txt");
Byte]a= "abcd" . getBytes();
Try{ FileOutputStream out = new FileOutputStream(f);
Out.write(a);
Out.close();
FileInputStream in = new FileInputStream(f);
Byte] tom= new byte 3];
Int m= in. read(tom, 0,3);
System. out. println(m);//【代码1】
String s = new String(tom, 0, 3);
System. out. println(s); //代码2】
M= in.read(tom, 0, 3);
System. out. println(m);//代码3】
S = new String( tom, 0,3);
System. out. println(s);//【代码4】
Catch( IOException e){}
}
}
int indexOf(int ch)
B:int lastIndexOf(int ch)
C:int indexOf(String str)
D:int lastIndexOf(String str)
}
}
class Rectangle extends Shape {
void display() { //实现抽象类的方法
System.out.println("Rectangle");
}
}
class Triangle extends Shape {
void display() { //实现抽象类的方法
System.out.println("Triangle");
}
}
public class AbstractClassDemo{
public static void main(String args]){
(new Circle()).display();//定义无名对象来调用对应的display方法
(new Rectangle()).display();
(new Triangle()).display();
}
}
abstract class Shape { //定义抽象类Shape和抽象方法display
abstract void display();
}
class Circle extends Shape {
void display() {//实现抽象类的方法
System.out.println("Circle");
}
}
class Rectangle extends Shape {
void display() { //实现抽象类的方法
System.out.println("Rectangle");
}
}
class Triangle extends Shape {
void display() { //实现抽象类的方法
System.out.println("Triangle");
}
}
public class AbstractClassDemo{
public static void main(String args]){
(new Circle()).display();//定义无名对象来调用对应的display方法
(new Rectangle()).display();
(new Triangle()).display();
}
}
A、Sum方法是:有参数无返回值的方法
B、Sum方法是:有参数有返回值的方法
C、Sum方法是:无参数无返回值的方法
D、Sum方法是:无参数有返回值的方法
A、public static void methodOne(int i){ }
B、public void methodTwo(int i){ }
C、public static void methodThree(int i,intj){ }
D、public static void methodForth(inti){ }