有一道JAVA 題不會，求大神指教該怎么做啊 ，急求！！
（模式識別方面，四個連續相等的數）編寫下面的方法，測試某個數組中是否有四個連續的值相同的數字rn publicBoolean isConsecutiveFour(int[] values)rn編寫測試程序，提示用戶輸入一個整數數列，如果這個數列有四個連續的具有相同值的數，那就顯示true，否則顯示false。代碼如下……
參數跟返回值你可以自己添加咯！
Scanner qvod = new Scanner(System.in);
String s = qvod.next();
char[] c = new char[s.length()];
boolean b = false;
for (int i = 0; i < c.length; i++) {
c[i]=s.charAt(i);
}
for (int i = 0; i < c.length; i++) {
//防止數組越界操作
if (c.length>i+3) {
if (c[i]==c[i+1]&&c[i]==c[i+2]&&c[i]==c[i+3]) {
b=true;
}
}
}
if (b) {
System.out.println("TRUE");
} else {
System.out.println("FALSE");
}
-------------------------------------分割完結線--------------------------
public static void main(String[] args) {
isConsecutiveFour(new int[]{5,2,3,5});//用戶輸入的數
}
public static Boolean isConsecutiveFour(int[] values){
int[] n=new int[]{5,2,3,5};///指定的數
if(n.length==values.length){
for(int i=0;i<values.length;i++){
if(n[i]!=values[i]){
System.out.println("false");
return false;
}
}
System.out.println("true");
return true;
}
return null;
}
最粗暴的做法..用for循環
public boolean isConsecutiveFour(int[] values){
boolean flag = false ;
int i=0 ;
int len = values.length ;
while(!flag&&i<len-1){
if(values[i]==values[i+1]){
if((i+2<len)&&values[i+1]==values[i+2]){
if((i+3<len)&&values[i+2]==values[i+3]){
flag = true ;
}
}
}
i++ ;
}
return flag ;
}
一道java編程題，看不懂什么意思，求指教！
用Java類表示平面解析幾何上的基本圖形線段(Line)和矩形(Rectangle)，并且這兩個類都是類Shape的子類。類Shape聲明如下：rnrnpublic class Shape {rnprivate String name;rnrnpublic Shape(){rn}rnpublic Shape(String name){rnthis.name = name;rn}rn}就是叫你定義2個類 一個為基本圖形線段(Line) ，一個為矩形(Rectangle)。這2個類都要繼承Shape類
public class Line extends Shape{
public Line (String name){
super(name);
}
}
public class Rectangleextends Shape{
public Rectangle(String name){
super(name);
}
}
這個java類的構造器，第一個是無參構造器，不寫的話會默認一個無參構造器，第二個是帶一個參數的構造器。構造器是用來創建java類的時候調用的
類Shape 是一個帶參數的構造方法和一個不帶參數的構造方法，基本圖形線段(Line)和矩形(Rectangle)這兩個繼承它，肯定是用到了類Shape里面不同的方法唄
這個Shape類是一個父類，里面定義了一個類屬性，和兩個構造函數。Line和Rectangle繼承Shape這個父類
我也不知道
我也看不懂你的意思
求一道Java編程題！！！
求一道Java編程題！！！編寫一個抽象類Person，內有變量姓名name，年齡age，性別sex，有構造方法。定義一個接口Jiekou，接口中有常量國籍country和顯示成員變量的printinfo()方法。定義Person類的子類Student，增加變量學校school、專業zhuanye；定義Person類的子類Teacher，增加變量學校school、職稱zhicheng、主講課程teach。類Student和Teacher都使用了該接口。寫出一個主類，測試上述類的正確性，測試時使用上轉型對象和接口回調技術來體現多態性--接口
public interface DisplayPeople {
public final String country="China";
void printInfo(Person p);
}
--抽線類
public abstract class Person implements DisplayPeople{
private String name;
private int age;
private String sex;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Person(){}
public Person(String name, int age, String sex) {
this();
this.name = name;
this.age = age;
this.sex = sex;
}
}
--Student類
public class Student extends Person implements DisplayPeople{
private String school;
private String profession;
public Student(String school, String profession) {
super();
this.school = school;
this.profession = profession;
}
public Student() {
}
@Override
public void printInfo(Person p) {
// TODO Auto-generated method stub
System.out.println("country:"+DisplayPeople.country+";name:"+p.getName()+";age:"+p.getAge()+";sex:"+p.getSex()+";school:"+this.getSchool()+";profession:"+this.getProfession());
}
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String getProfession() {
return profession;
}
public void setProfession(String profession) {
this.profession = profession;
}
}
--Teacher類
public class Teacher extends Person implements DisplayPeople{
private String school;
private String zhicheng;
private String teach;
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String getZhicheng() {
return zhicheng;
}
public void setZhicheng(String zhicheng) {
this.zhicheng = zhicheng;
}
public String getTeach() {
return teach;
}
public void setTeach(String teach) {
this.teach = teach;
}
@Override
public void printInfo(Person p) {
System.out.println("country:"+DisplayPeople.country+";name:"+p.getName()+";age:"+p.getAge()+";sex:"+p.getSex()+";school:"+this.getSchool()+";zhicheng:"+this.getZhicheng()+";teach:"+this.getTeach());
}
}
--測試類
public class Client {
public static void main(String[] args) {
Student student=new Student();
student.setAge(20);
student.setName("John");
student.setSex("Male");
student.setProfession("couputer");
student.setSchool("Beijingdaxue");
Person p=student;
p.printInfo(p);
Teacher tea=new Teacher();
tea.setAge(25);
tea.setName("Mary");
tea.setSex("Female");
tea.setTeach("English");
tea.setSchool("Beijingdaxue");
Person p1=tea;
p.printInfo(p1);
}
}
public class Test {// 測試類
public static void main(String[] args) throws IOException {
Student s = new Student("zhangsna",12,"nan","默默大學","機械專業");
Teacher t = new Teacher("lili",30,"nv","默默大學","教授","機械");
s.showInfo();
t.showInfo();
}
}
class People{
String name;
int age;
String sex;
public People(String name, int age, String sex) {
super();
this.name = name;
this.age = age;
this.sex = sex;
}
}
interface JieKou{
final String COUNTRY="china";
public void showInfo();
}
class Student extends People implements JieKou{
private String school;
private String zhuanye;
@Override
public void showInfo() {
System.out.println("姓名："+name+"\t年齡:"+age+"性別:"+sex+"學校："+school+",專業："+zhuanye);
}
public Student(String name, int age, String sex, String school, String zhuanye) {
super(name, age, sex);
this.school = school;
this.zhuanye = zhuanye;
}
}
class Teacher extends People implements JieKou{
private String school;
private String zhicheng;
private String teach;
@Override
public void showInfo() {
System.out.println("姓名："+name+"\t年齡:"+age+"性別:"+sex+"學校："+school+",職稱："+zhicheng+",主講課程："+teach);
}
public Teacher(String name, int age, String sex, String school, String zhicheng, String teach) {
super(name, age, sex);
this.school = school;
this.zhicheng = zhicheng;
this.teach = teach;
}
}
就這些
請問大家一道JAVA編程題目求大神幫助
創建一個類Point，包含兩個成員變量x、y分別表示x和y坐標，兩個構造器Point()和Point(x0,y0)，以及一個movePoint(int dx,int dy)方法來實現點的位置移動。編寫一個可運行類PointDemo，在main方法中創建兩個Point類的對象p1和P2，要求分別用不同的構造方法創建。在p1和P2對象中分別調用movePoint方法后，打印x和y的值。class Point { int x,y; public Point() { x=0; y=0; } public Point(int x,int y) { this.x=x; this.y=y; } public void movePoint(int dx,int dy) { x+=dx; y+=dy; } } public class PointDemo { public static void main(String[] args) { Point p1=new Point(); Point P2=new Point(8,9); p1.movePoint(4, 5); System.out.println("對象p1中的x，y移動后的值分別為：x="+p1.x+"\t"+"y="+p1.y); P2.movePoint(5, 6); System.out.println("對象P2中的x，y移動后的值分別為：x="+P2.x+"\t"+"y="+P2.y); } } 呵呵，大概就是上面的了
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