我需要一些帮助，我试图使用某个公式（线性全等方法）来改组一系列问题，但我如何将它们应用到我的数组中呢？
> X(i+1) = (a * X(i) + c) mod M
M是模量。 M> 0
a是乘数，0 <= a＆lt;微米。
c是增量，0＆lt; = c＆lt;微米。
X（0）是种子值，0 <= X（0）<0。微米。
我是迭代器。我＆lt; M
public class lcm {
// Linear congruential values for x(i+1) = (a * x(i) + b) % m.
final static int a = 6;
final static int b = 9;
final static int m = 25;
// Current value for returning.
int x;
public lcm() {
// Constructor simply sets value to half of m, equivalent to 0.5.
x =0;
}
int next() {
// Calculate next value in sequence.
x = (a * x + b) % m;
// Return its 0-to-1 value.
return (int)x;
}
public static void main(String[] args) {
// Create a new myRnd instance.
lcm r = new lcm();
// Output 20 random numbers from it.
for (int i = 0; i < 25; i++) {
System.out.println (r.next());
}
}
}
使这样的输出
9
13
12
6
20
4
8
7
1
15
24
3
2
21
10
19
23
22
16
5
14
18
17
11
0
尝试通过lcm输出将数组混洗到此列表
public class QuizActivity extends AppCompatActivity {
private TextView mScoreView, mQuestion;
private ImageView mImageView;
private Button mTrueButton, mFalseButton;
private boolean mAnswer;
private int mScore = 0;
private int mQuestionNumber = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz);
mScoreView = (TextView)findViewById(R.id.points);
mImageView = (ImageView)findViewById(R.id.imageView);
mQuestion = (TextView)findViewById(R.id.question);
mTrueButton = (Button)findViewById(R.id.trueButton);
mFalseButton = (Button)findViewById(R.id.falseButton);
updateQuestion();
//Logic for true button
mTrueButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(mAnswer == true) {
mScore++;
updateScore(mScore);
//perform check before you update the question
if (mQuestionNumber == questionArray.length) {
Intent i = new Intent(QuizActivity.this, ResultsActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("finalScore", mScore);
i.putExtras(bundle);
QuizActivity.this.finish();
startActivity(i);
} else {
updateQuestion();
}
}
else {
if (mQuestionNumber == questionArray.length) {
Intent i = new Intent(QuizActivity.this, ResultsActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("finalScore", mScore);
i.putExtras(bundle);
QuizActivity.this.finish();
startActivity(i);
} else {
updateQuestion();
}
}
}
});
//Logic for false button
mFalseButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(mAnswer == false) {
mScore++;
updateScore(mScore);
//perform check before you update the question
if (mQuestionNumber == questionArray.length) {
Intent i = new Intent(QuizActivity.this, ResultsActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("finalScore", mScore);
i.putExtras(bundle);
QuizActivity.this.finish();
startActivity(i);
} else {
updateQuestion();
}
}
else {
if (mQuestionNumber == questionArray.length) {
Intent i = new Intent(QuizActivity.this, ResultsActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("finalScore", mScore);
i.putExtras(bundle);
QuizActivity.this.finish();
startActivity(i);
} else {
updateQuestion();
}
}
}
});
}
private void updateQuestion() {
shuffleQuizbook();
mImageView.setImageResource(questionArray[0].getmImages());
mQuestion.setText(questionArray[0].getmQuestions());
mAnswer = questionArray[0].getmAnswers();
mQuestionNumber++;
}
QuizBook q0 = new QuizBook(R.drawable.ant,"Ants lives in a colony",true);
QuizBook q1 = new QuizBook(R.drawable.bird,"Bird can fly",true);
QuizBook q2 = new QuizBook(R.drawable.camel,"Camel can survive in a dessert",true);
QuizBook q3 = new QuizBook(R.drawable.cow,"Cows laid eggs",false);
QuizBook q4 = new QuizBook(R.drawable.crocodile,"Crocodiles are mammals",false);
QuizBook q5 = new QuizBook(R.drawable.dog,"Dogs has excellent sniffing ability",true);
QuizBook q6 = new QuizBook(R.drawable.duck,"Ducks able to swim",true);
QuizBook q7 = new QuizBook(R.drawable.elephant,"Elephants has a wide ears",true);
QuizBook q8 = new QuizBook(R.drawable.giraffe,"Girrafe has a short neck",false);
QuizBook q9= new QuizBook(R.drawable.hippopotamus,"Hippo's average weights are <1000kgs",false);
QuizBook q10 = new QuizBook(R.drawable.horse,"Horses has four legs",true);
QuizBook q11 = new QuizBook(R.drawable.kangaroo,"Kangaroos has a pocket in their belly",true);
QuizBook q12= new QuizBook(R.drawable.lion,"Only male lion has long hair around their neck",true);
QuizBook q13= new QuizBook(R.drawable.monkey,"Monkey is a carnivore",false);
QuizBook q14= new QuizBook(R.drawable.mouse,"Mouse is an omnivore",true);
QuizBook q15 = new QuizBook(R.drawable.pig,"Pigs only has 4 milk udders",false);
QuizBook q16= new QuizBook(R.drawable.rabbit,"Rabbits has long ears",true);
QuizBook q17= new QuizBook(R.drawable.rhino,"There is no one-horned rhino",false);
QuizBook q18= new QuizBook(R.drawable.rooster,"Rooster laid eggs",false);
QuizBook q19= new QuizBook(R.drawable.shark,"Shark is not a fish",true);
QuizBook q20= new QuizBook(R.drawable.sheep,"Sheep is a carnivore",false);
QuizBook q21= new QuizBook(R.drawable.snail,"Snails moves very fast",false);
QuizBook q22= new QuizBook(R.drawable.snake,"Snake doesn't have any legs",true);
QuizBook q23= new QuizBook(R.drawable.tiger,"Only tiger's furs are stripped",false);
QuizBook q24= new QuizBook(R.drawable.whale,"Whale doesn't need to resurface to breathe",false);
QuizBook [] questionArray = new QuizBook[]{q0,q1,q2,q3,q4,q5,q6,q7,q8,q9,q10,q11,q12,q13,q14,q15,q16,q17,q18,q19,q20,q21,q22,q23,q24};
public void shuffleQuizbook() {
Collections.shuffle(Arrays.asList(questionArray));
}
private void updateScore(int point) {
mScoreView.setText("" + mScore);
}
public void clickExit(View view) {
askToClose();
}
@Override
public void onBackPressed() {
askToClose();
}
private void askToClose (){
AlertDialog.Builder builder = new AlertDialog.Builder(QuizActivity.this);
builder.setMessage("Are you sure you want to quit?");
builder.setCancelable(true);
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
finish();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
我将使用lcm的输出从上面的列表中随机播放数组
如果有人告诉我如何
，我真的很感激