单选题import java.util.*; class ScanStuff { public static void main(String [] args) { String s = "x,yy,123"; Scanner sc = new Scanner(s); while (sc.hasNext()) System.out.print(sc.next() + " "); } } 结果是什么?()Ax yyBx,yyCx yy 123Dx,yy,123
单选题
import java.util.*; class ScanStuff { public static void main(String [] args) { String s = "x,yy,123"; Scanner sc = new Scanner(s); while (sc.hasNext()) System.out.print(sc.next() + " "); } } 结果是什么?()
A
x yy
B
x,yy
C
x yy 123
D
x,yy,123
参考解析
解析:
暂无解析
相关考题:
设有如下程序: import java.util.*; public class Sun { public static void main(String args[ ]) { int score; String a; Random r=new Random(); score=r.nextInt(4)+5; switch(score) { case 0: a="E"; break; case 1: a="D"; break; case 2: a="C"; break; case 3: a="B"; break; default: a="A"; } System.out.println(A) ; } } 程序运行的结果是( )。A.a="A"B.aa"E" a="A"C.a="E"D.a="C"
如下两个源程序文件,分别编译后,运行Example.class文件,运行结果为______。AB.java文件代码如下;package test;public class AB{int a=60;public void show(){System.out.println(”a=”+a);}Example.java文件代码如下:import test.AB;class Example{public static void main(String args[]){AB bj=new AB();obj.show();}}
下列程序将类C15的对象写入文件filetxt,选择正确的语句填入下列程序的横线处。 package ch2; import java.util.*; import java.io.*; class C15______ { public iht a; public void setInt(int newa) { a = newa; } } public class Testl5 { pulibc static void main(String[] args) { C15 bj = new C15(); try { FileOutputStream fos =newFileOutputStream("ch2\\filel5.txt"); ObjectOutputStream os = ObjectOutputStream(fos); Obj.setInt(10); oos.writeObject(obj); oos.close (); fos.close(); } catch(IOException ioe) { ioe.printStackTrace(); } } }A.implements RunnableB.implements SedalizableC.extends SerializableD.implements InputStream
下列代码的输出结果是( )。class parent{void printme(){System.out.println("parent");}}class child extends parent{void printme(){System. out.println("child");}void printall(){super, printme();this.printme();printme();}}public class test{public static void main(String args[]){child myc=new child();myc.printall();}}A.import java.awt.*;B.import java.applet.applet;C.import java.io.*;D.import java, awt.graphics;
下列程序在运行时会产生______。 import java.awt.*; public class ex33 { public static void maiN(String[] args) { Image im[] = new Image[4]; System.out.println (im[0] .toString ()); } }A.NumberFormatExeeptionB.ArittnneticExceptionC.ArrayIndexOutOfBoundsExcepfionD.NullPointerException
请在下列程序的横线处填入正确的语句。 import java.awt.*; import java.awt,event.*; public class ex16 { Frame. f; TextArea ta; Button btn; public static void main(String[] args) { ex16 e = new ex16(); e.m(); } public void m() { f = new Frame("ex16"); ta = new TextArea(); btn = new Button("ok"); btn.addActionListener(new MyAction()); f.add(ta, "Center"); f.add(btn, "South"); f.setSize(100, 100); f.setVisible (true); } class MyAction implements ActionListener { ______ { System. out.println (ta. getText ()); } } }A.static void actionPcrformcd(AcfionEvent e)B.public void action(ActionEwent e)C.public actionPerformed(ActionEvent e)D.public void actionPerformed(ActionEvent e)
请完善程序(程序文件名:Java_3.java)并进行调试。请在下画线处填入正确内容,然后删除下画线。请勿删除注释行和其他已有的语句内容。[题目要求]生成下面左边图形界面,单击图中的New按钮,弹出如右图所示的对话框。源程序:import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Java_3 {public static void main(String[] args) {MulticastFrame. frame=new MulticastFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.show();}}class MulticastFrame. extends JFrame. {public MulticastFrame() {setTitle("MulticastTest");setSize(WIDTH,HEIGHT);MulticastPanel panel=new MulticastPanel();Container contentPane=getContentPane();contentPane.add( (1) );}public static final int WIDTH=300;public static final int HEIGHT=200;}class MulticastPanel extends JPanel }public MulticastPanel() {JButton newButton=new JButton("New");add(newButton);ActionListener newListener=new ActionListener() {public void actionPerformed(ActionEvent event) {makeNewFrame();}};newButton.addActionListener(newListener);closeAllButton=new JButton("Close all");add(closeAllButton);}private void makeNewFrame() {final BlankFrame. frame=new BlankFrame();frame.show();ActionListener closeAllListener=new ActionListener() {public void actionPerformed(ActionEvent event) {frame. (2) (); //使窗口隐藏或消除}};closeAllButton.addActionListener( (3) );}private JButton closeAllButton;}Class BlankFrame. extends JFrame. {public BlankFrame() {(4) ++;setTitle("Frame"+counter);setSize(WIDTH,HEIGHT);setLocation(SPACING*counter,SPACING*counter);}public static final int WIDTH=200;public static final int HEIGHT=150;public static final int SPACING=30;private static int counter=0;}
本题的功能是获取鼠标在窗口中的位置。当鼠标移进窗口中,就会实时显示鼠标在窗口中的相对位置,比如显示为"鼠标的当前位置:X:Y"(其中,X为横坐标,Y为纵坐标)。import java.awt.*;import java.awt.event.*;import java.util.*;import javax.swing.*;public class java2{public static void main(String[]args){MouseFrame. frame=new MouseFrame();frame.setDefaultCloseoperation(JFrame.EXIT_0N CLOSE);frame.show();}}class MouseFrame. extends JFrame{public MouseFrame(){setTitle("java2");setSize(WIDTH,HEIGHT);MousePanel panel=new MousePanel();Container contentPane=getContentPane();contentPane.add(panel);}public static final int WIDTH = 300;public static final int HEIGHT=200;}class MousePanel extends JPanel{public MousePanel(){addMouseListener(new MouseHandler());addMouseMotionListener(new MouseMotionHan-dler());}public void paintComponent(Graphics g)(super.paintComponent(g);String text="鼠标指针位置:"+mousex+":"+mousey;g.drawString(text,10,10);}private int mousex,mousey;private class MouseMotionHandler {public void mouseMoved(MouseEvent event){mousex=event.getX();mousey=event.getY();repaint();}public void mouseDragged(MouseEvent event){mousex=event.getX();mousey=event.getY();repaint();}}private class MouseHandler{public void mousePressed(MouseEvent eveat){mousex=event.getX();mousey=event.getY();}}}
下列程序实现对ZIP文件file.zip的检索,在横线处填入正确的语句 package test; import java.io.*: import java.util.*; import java.util.zip.*; public class Exam { public static void main(String[])args){ try{ FileInputStream fis=new FileInputStream("test/file.zip"); ZipInputStreamzis=new ZipInputStream(fis); ZipEntry en; while ((_____)!=null){ en.getName(); zis.closeEntry(); } zis.close(); } catch(Exception e) { e.printStackTrace(); } } }A.en = zis.getNextEntry()B.en = zis.getNextEntry()C.en = zis.getEntry()D.zis.getNextEntry()
以下程序调试结果为:public class Test {int m=5;public void some(int x) {m=x;}public static void main(String args []) {new Demo().some(7);}}class Demo extends Test {int m=8;public void some(int x) {super.some(x);System.out.println(m);}}A.5B.8C.7D.无任何输出E.编译错误
以下的程序的调试结果为?public class MyAr{public static void main(String argv[]) {MyAr m = new MyAr();m.amethod();}public void amethod(){static int i;System.out.println(i);}} A. 输出结果为 0B. 运行出错C. 输出结果为 nullD. 编译错误
import java.util.*; class Banana3 { public static void main(String [] args) { int x = 2; Banana3 b = new Banana3(); b.go(x); } static { x += x; } void go(int x) { ++x; System.out.println(x); } } 结果为:() A、2B、3C、5D、编译失败
Which declarations will allow a class to be started as a standalone program?() A、public void main(String args[])B、public void static main(String args[])C、public static main(String[] argv)D、final public static void main(String [] array)E、public static void main(String args[])
import java.util.*; public class PQ { public static void main(String[] args) { PriorityQueue pq = new PriorityQueue(); pq.add(”carrot”); pq.add(”apple”); pq.add(”banana”); System.out.println(pq.poll() +”:” + pq.peek()); } } What is the result?() A、 apple:appleB、 carrot:appleC、 apple:bananaD、 banana:appleE、 carrot:carrotF、 carrot:banana
现有: import java.util.*; class AddStuff2 { public static void main(String [] args) { TreeSett=new TreeSet(); if (t.add("one")) if (t.add("two")) if (t.add ("three")) add("four"); for (String s : t) System.out.print (s); } } 结果为:() A、 oneB、 one three twoC、 one two threeD、 one two three fourE、 four one three twoF、编译失败
现有: import java.util.*; class ScanStuff { public static void main (String [] args) { String S= "x,yy,123"; Scanner sc = new Scanner (s); while (sc.hasNext()) System.out.print (sc.next() +" "); } } 结果是什么?() A、 x yyB、 x,yy,123C、 x yy 123D、 x,yyE、编译失败F、运行的时候有异常抛出
package sun.scjp; public enum Color { RED, GREEN, BLUE } package sun.beta; // insert code here public class Beta { Color g = GREEN; public static void main( String[] argv) { System.out.println( GREEN); } } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile?()A、 import sun.scjp.Color.*;B、 import static sun.scjp.Color.*;C、 import sun.scjp.Color; import static sun.scjp.Color.*;D、 import sun.scjp.*; import static sun.scjp.Color.*;E、 import sun.scjp.Color; import static sun.scjp.Color.GREEN;
Given a class Repetition: 1.package utils; 2. 3.public class Repetition{ 4.public static String twice(Strings){returns+s;} 5.} and given another class Demo: 1.//insert code here2. 3.public class Demo{ 4.public static void main(String[]args){ 5.System.out.println(twice("pizza")); 6.} 7.} Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()A、import utils.*;B、static import utils.*;C、importutils.Repetition.*;D、static importutils.Repetition.*;E、import utils.Repetition.twice();F、import static utils.Repetition.twice;G、static import utils.Repetition.twice;
定义类: package utils; public class Rep{ public static String twice (String s){return s+s ;} } 再定义另一个类Demo: //insert code here public class Demo{ public static void main (String[] args){ System. out .println( twice( "Hello")); } } 在第一行插入哪项代码,可以使程序正常编译和执行?() A、import utils.*;B、 import utils.Rep.*;C、 import static utils.Rep.twice;D、 static import utils.Rep.twice;
单选题import java.util.*; class Banana3 { public static void main(String [] args) { int x = 2; Banana3 b = new Banana3(); b.go(x); } static { x += x; } void go(int x) { ++x; System.out.println(x); } } 结果为:()A2B3C5D编译失败
单选题import java.util.*; public class PQ { public static void main(String[] args) { PriorityQueue pq = new PriorityQueue(); pq.add(”carrot”); pq.add(”apple”); pq.add(”banana”); System.out.println(pq.poll() +”:” + pq.peek()); } } What is the result?()A apple:appleB carrot:appleC apple:bananaD banana:appleE carrot:carrotF carrot:banana
单选题定义类: package utils; public class Rep{ public static String twice (String s){return s+s ;} } 再定义另一个类Demo: //insert code here public class Demo{ public static void main (String[] args){ System. out .println( twice( "Hello")); } } 在第一行插入哪项代码,可以使程序正常编译和执行?()Aimport utils.*;B import utils.Rep.*;C import static utils.Rep.twice;D static import utils.Rep.twice;
多选题package sun.scjp; public enum Color { RED, GREEN, BLUE } package sun.beta; // insert code here public class Beta { Color g = GREEN; public static void main( String[] argv) { System.out.println( GREEN); } } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile?()Aimport sun.scjp.Color.*;Bimport static sun.scjp.Color.*;Cimport sun.scjp.Color; import static sun.scjp.Color.*;Dimport sun.scjp.*; import static sun.scjp.Color.*;Eimport sun.scjp.Color; import static sun.scjp.Color.GREEN;
单选题Given a class Repetition: 1.package utils; 2. 3.public class Repetition{ 4.public static String twice(Strings){returns+s;} 5.} and given another class Demo: 1.//insert code here2. 3.public class Demo{ 4.public static void main(String[]args){ 5.System.out.println(twice("pizza")); 6.} 7.} Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()Aimport utils.*;Bstatic import utils.*;Cimportutils.Repetition.*;Dstatic importutils.Repetition.*;Eimport utils.Repetition.twice();Fimport static utils.Repetition.twice;Gstatic import utils.Repetition.twice;
单选题现有: import java.util.*; class AddStuff2 { public static void main(String [] args) { TreeSett=new TreeSet(); if (t.add("one")) if (t.add("two")) if (t.add ("three")) add("four"); for (String s : t) System.out.print (s); } } 结果为:()A oneB one three twoC one two threeD one two three fourE four one three twoF编译失败
单选题Given a class Repetition: 1. package utils; 2. 3. public class Repetition { 4. public static String twice(String s) { return s + s; } 5. } and given another class Demo: 1. // insert code here 2. 3. public class Demo { 4. public static void main(String[] args) { 5. System.out.println(twice(”pizza”)); 6. } 7. } Which code should be inserted at line 1 of Demo.java to compile and run Demo to print“pizzapizza”?()A import utils.*;B static import utils.*;C import utils.Repetition.*;D static import utils.Repetition. *;E import utils.Repetition.twice();F import static utils.Repetition.twice;G static import utils.Repetition.twice;
单选题现有: import java.util.*; class ScanStuff { public static void main (String [] args) { String S= "x,yy,123"; Scanner sc = new Scanner (s); while (sc.hasNext()) System.out.print (sc.next() +" "); } } 结果是什么?()A x yyB x,yy,123C x yy 123D x,yyE编译失败F运行的时候有异常抛出