本文介绍了如何检查一个元素是否已经存在阵列中的的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是从一个页面发送值到另一个,我想保存我甲肝发送的值,&安培;然后要比较哪个我跟我甲肝已经发出一个发送的值,即保存value.while存储值到arrayin持久化对象,&安培;然后用另一个阵列比较值,我面对一些概率,谁能告诉我如何检查值是否已经存在数组中,我给了code,好心帮
包com.firstBooks.series.db;进口了java.util.Random;进口net.rim.device.api.system.PersistentObject;
进口net.rim.device.api.system.PersistentStore;
进口net.rim.device.api.util.Arrays;
进口net.rim.device.api.util.Persistable;
进口com.firstBooks.series.db.parser.XMLParser;
进口com.firstBooks.series.ui.managers.TopManager;
进口com.firstBooks.series.ui.screens.TestScreen;
公共类DBMain实现持久化{ 公共静态字符串的回答=;
公共静态字符串selectedAnswer =;
公共静态问题curQuestion; 公共静态INT currQuesNumber = 1;
公共静态INT correctAnswerCount = -1;
静态INT curQuesnew;
静态INT quesCount = -1;
静态INT XYZ;
静态INT J = 0;
公共静态INT totalNumofQuestions = Question.totques;
公共静态INT quesNum [] =新的INT [XMLParser.questionList.size()];
静态持久性对象qStore;
静态持久性对象curQues;
静态持久性对象pQues;
静态持久性对象curans;
静态持久性对象DISQUES;
静态持久性对象restques;
静态int类型的;
静态INT B:
静态INT [℃;
静态INT [] D;
静态INT pques;
静态INT罐;
静态INT [] dques;
静态INT [] rques; 静态的 {
qStore = PersistentStore.getPersistentObject(0x33010065d24c7883L);
curQues = PersistentStore.getPersistentObject(0x33010064d24c7883L);
pQues = PersistentStore.getPersistentObject(0xbd7460a5b4f9890aL);
curans = PersistentStore.getPersistentObject(0xc5c065a3ae1bec21L);
DISQUES = PersistentStore.getPersistentObject(0xbf8118045165a07aL);
} 静态的{
初始化();
}
公共静态无效的initialize(){ // INT quesNum [] =新的INT [XMLParser.questionList.size()]; 随机RGen元=新的随机(); //随机数发生器
// int类型的=的Integer.parseInt(TopManager.quesNumber);
AAAAAAA的//System.out.println(\"The值是......+一);
// ---初始化数组
的for(int i = 0; I< quesNum.length;我++){
quesNum [我] =我;
} // ---每个元素随机交换洗牌
的for(int i = 0; I< quesNum.length;我++){
INT randomPosition = rgen.nextInt(quesNum.length);
INT TEMP = quesNum [I]
quesNum [I] = quesNum [randomPosition]
quesNum [randomPosition] =温度; } 同步(qStore){ qStore.setContents(quesNum);
qStore.commit();
}
}
公共静态INT getQuestionNumber(){
// INT quesCount;
// quesCount ++;
//同步(curQues){
// quesCount =的Integer.parseInt((字符串)curQues.getContents());
//}
quesCount ++;
同步(curans){ INT B =的Integer.parseInt(TopManager.corrCount);
curans.setContents(B +);
curans.commit(); }
// INT quesNum []; 同步(qStore){
quesNum =(INT [])qStore.getContents();
的System.out.println(问题的价值......+ quesNum.length);
}
同步(pQues){ int类型的=的Integer.parseInt(TopManager.quesNumber);
pQues.setContents(A +);
pQues.commit(); } 如果(quesNum = NULL&放大器;!&安培; quesCount< quesNum.length){ 同步(curQues){ curQuesnew = quesNum [quesCount]
curQues.setContents(curQuesnew +);
curQues.commit();
} 同步(DISQUES){
C [J] = TestScreen.quesNumber;
的System.out.println(Astala vistaaaaaaaaaaaaa+ C);
disques.setContents(C +);
disques.commit();
}
同步(DISQUES){
dques [J] =的Integer.parseInt((字符串)disques.getContents());
的System.out.println(valueee是..........+ dques);
} 对于(INT K = 0; K< dques.length; k ++){
如果(quesNum [quesCount]!= dques [K]){
的System.out.println(ghijyghfhgfhfhgfhgfhgfhgfhgddkjklmn);
XYZ = quesNum [quesCount]
}
J ++;
}
返回XYZ;
}其他{
初始化();
quesCount = -1;
返回getQuestionNumber();
} }
公共静态INT的get presentQuestionNumber(){
同步(pQues){
pques =的Integer.parseInt((字符串)pQues.getContents()); }
返回pques;
} 公共静态INT getCorrectanswerNumber(){
同步(curans){
罐=的Integer.parseInt((字符串)curans.getContents());
}
返回罐;
} 公共静态INT getCurrQuestionNumber(){
同步(curQues){
返回的Integer.parseInt((字符串)curQues.getContents());
//返回curQuesnew;
// curQuesnew =(INT [])curQues.getContents();
//返回curQuesnew [quesCount]
}
}
}
解决方案
要检查的一种方式,如果在数组中存在的值:
Arrays.asList(的someArray)。载有(值);
i am sending value from one page to another,i want to store the values which i hav sent,& then want to compare the value which i am sending with the one which i hav already sent,i.e the saved value.while storing the values into an arrayin persistent object,& then comparing the value with another array,i face some prob,can anyone tell me how to check whether a value already exits in the array,i am giving the code,kindly help
package com.firstBooks.series.db;
import java.util.Random;
import net.rim.device.api.system.PersistentObject;
import net.rim.device.api.system.PersistentStore;
import net.rim.device.api.util.Arrays;
import net.rim.device.api.util.Persistable;
import com.firstBooks.series.db.parser.XMLParser;
import com.firstBooks.series.ui.managers.TopManager;
import com.firstBooks.series.ui.screens.TestScreen;
public class DBMain implements Persistable{
public static String answer = "";
public static String selectedAnswer = "";
public static Question curQuestion;
public static int currQuesNumber = 1;
public static int correctAnswerCount = -1;
static int curQuesnew;
static int quesCount=-1;
static int xyz;
static int j=0;
public static int totalNumofQuestions = Question.totques;
public static int quesNum[] = new int[XMLParser.questionList.size()];
static PersistentObject qStore;
static PersistentObject curQues;
static PersistentObject pQues;
static PersistentObject curans;
static PersistentObject disques;
static PersistentObject restques;
static int a ;
static int b;
static int[] c ;
static int[] d ;
static int pques;
static int cans;
static int[] dques;
static int[] rques;
static {
qStore = PersistentStore.getPersistentObject(0x33010065d24c7883L);
curQues = PersistentStore.getPersistentObject(0x33010064d24c7883L);
pQues = PersistentStore.getPersistentObject(0xbd7460a5b4f9890aL);
curans = PersistentStore.getPersistentObject(0xc5c065a3ae1bec21L);
disques = PersistentStore.getPersistentObject(0xbf8118045165a07aL);
}
static{
initialize();
}
public static void initialize() {
//int quesNum[] = new int[XMLParser.questionList.size()];
Random rgen = new Random(); // Random number generator
//int a=Integer.parseInt(TopManager.quesNumber);
//System.out.println("The value of AAAAAAA is...."+a);
// --- Initialize the array
for (int i = 0; i < quesNum.length; i++) {
quesNum[i] = i;
}
// --- Shuffle by exchanging each element randomly
for (int i=0; i< quesNum.length; i++) {
int randomPosition = rgen.nextInt(quesNum.length);
int temp = quesNum[i];
quesNum[i] = quesNum[randomPosition];
quesNum[randomPosition] = temp;
}
synchronized (qStore) {
qStore.setContents(quesNum);
qStore.commit();
}
}
public static int getQuestionNumber() {
//int quesCount;
//quesCount++;
//synchronized (curQues) {
//quesCount = Integer.parseInt((String)curQues.getContents());
//}
quesCount++;
synchronized (curans) {
int b=Integer.parseInt(TopManager.corrCount);
curans.setContents(b+"");
curans.commit();
}
//int quesNum[];
synchronized (qStore) {
quesNum=(int[]) qStore.getContents();
System.out.println("The value of question is ...."+quesNum.length);
}
synchronized (pQues) {
int a=Integer.parseInt(TopManager.quesNumber);
pQues.setContents(a+"");
pQues.commit();
}
if (quesNum!=null && quesCount < quesNum.length) {
synchronized (curQues) {
curQuesnew=quesNum[quesCount];
curQues.setContents(curQuesnew+"");
curQues.commit();
}
synchronized (disques) {
c[j]=TestScreen.quesNumber;
System.out.println("Astala vistaaaaaaaaaaaaa"+c);
disques.setContents(c+"");
disques.commit();
}
synchronized (disques) {
dques[j]=Integer.parseInt((String)disques.getContents());
System.out.println("valueee is.........."+dques);
}
for(int k=0;k<dques.length;k++){
if(quesNum[quesCount]!=dques[k]){
System.out.println("ghijyghfhgfhfhgfhgfhgfhgfhgddkjklmn");
xyz=quesNum[quesCount];
}
j++;
}
return xyz;
} else {
initialize();
quesCount = -1;
return getQuestionNumber();
}
}
public static int getpresentQuestionNumber(){
synchronized (pQues) {
pques=Integer.parseInt((String)pQues.getContents());
}
return pques;
}
public static int getCorrectanswerNumber(){
synchronized (curans) {
cans=Integer.parseInt((String)curans.getContents());
}
return cans;
}
public static int getCurrQuestionNumber() {
synchronized (curQues) {
return Integer.parseInt((String)curQues.getContents());
//return curQuesnew;
//curQuesnew=(int[]) curQues.getContents();
//return curQuesnew[quesCount];
}
}
}
解决方案
One way to check if a value exists in an array:
Arrays.asList(someArray).contains(value);
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