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  • Java实验十

    1

     1 public class Exercise21_06 {
     2     public static void main(String[] args){
     3         int key;
     4         // 创建一个散列映射
     5         HashMap<Integer, Integer> hashMap = new HashMap<>();
     6         // 创建一个Scanner对象
     7         Scanner input = new Scanner(System.in);
     8         System.out.println("请输入整数");
     9         
    10         do{
    11             key = input.nextInt(); 
    12             if(hashMap.containsKey(key)){
    13                 hashMap.put(key, hashMap.get(key) + 1);
    14             }else{
    15                 hashMap.put(key, 1);
    16             }
    17         }while(key != 0);
    18         
    19         TreeSet<Integer> treeSet = new TreeSet<>(hashMap.values());
    20         for(int k: hashMap.keySet()){
    21             if(hashMap.get(k)==treeSet.last()){
    22                 System.out.println(k + "出现的次数最高,共计" + treeSet.last() + "次");
    23             }
    24         }
    25     }
    26 }

    2

    public class WordOccurrence implements Comparable{
        String word;
        int count;
            
        public WordOccurrence(String word, int count){
            this.word = word;
            this.count = count;
        }
    
        @Override
        public int compareTo(Object o) {
            WordOccurrence w = (WordOccurrence)o;
            return this.count - w.count;   
        }  
    }
    public class CountOccurrenceOfWords {
        public static void main(String[] args){
            // 创建一个String文本
            String text = "Good Morning. Have a good class." + "Have a good visit. Have fun!";
           // 创建一个树形映射
            TreeMap<String, Integer> treeMap = new TreeMap<>();
            // 提取文本中的单词
            String[] words = text.split("[\s+\p{P}]");
            
            for(String s: words){
                if(s.length() > 0){
                    if(!treeMap.containsKey(s)){
                        treeMap.put(s.toLowerCase(), 1);
                    }else{
                        treeMap.put(s.toLowerCase(), treeMap.get(s) + 1);
                    }
                }
            }
            
            ArrayList<WordOccurrence> aList = new ArrayList<>();
            for(String k: treeMap.keySet()){
                WordOccurrence wo = new WordOccurrence(k, treeMap.get(k)); 
                aList.add(wo);
            }
            
            Collections.sort(aList, new Comparator(){
                public int compare(Object o1, Object o2){
                    WordOccurrence wo1 = (WordOccurrence)o1;
                    WordOccurrence wo2 = (WordOccurrence)o2;
                    return wo1.compareTo(wo2); 
                }
            });
            
            for(WordOccurrence w: aList){
                System.out.println(w.word + "	" + w.count);
            }
        }
    }

    如果将WordOccurrence实例放入树形集,最终只会输出数量不重复的单词!

    3

    public class Exercise30_01 extends Application{
        static TextArea tf = new TextArea();
        public static void main(String[] args){
            Application.launch(args); 
        }
    
        @Override
        public void start(Stage stage){
            tf.setMinWidth(700);
            tf.setWrapText(true);
    
            Scene scene = new Scene(tf, 700, 300);
            stage.setScene(scene);
            stage.setTitle("Exercise30_01"); 
            stage.show();
            
            Runnable printA = new printChar(tf, "a", 100);
            Runnable printB = new printChar(tf, "b", 100);
            Runnable print100 = new printNum(tf, 100);
            
            Thread thread1 = new Thread(printA);
            Thread thread2 = new Thread(printB);
            Thread thread3 = new Thread(print100);
            
            thread1.start();
            thread2.start();
            thread3.start();
            
        }   
    }
    
    class printChar implements Runnable{
        TextArea tf;
        String charToPrint;
        int times;
        public printChar(TextArea tf, String c, int t){
            this.tf = tf;
            charToPrint = c;
            times = t;
        }
        
        @Override
        public void run() {
                Platform.runLater(new Runnable() {
                    public void run() {
                        for(int i = 0; i < times; i++){
                        tf.appendText(" " + charToPrint);
                        }
                    }
                });
        }
    }
    
    class printNum implements Runnable{
        TextArea tf;
        int lastNum;
        
        public printNum(TextArea tf,int last){
            lastNum = last;
            this.tf = tf;
        }
    
        @Override
        public void run() {
            Platform.runLater(new Runnable() {
                public void run() {
                    for(int i = 1; i <= lastNum; i++){
                        final int j = i;
                        tf.appendText(Integer.toString(j) + " "); 
                    }
                }
             });
        }
    }

    4

    public class FlagRisingAnimation extends Application{
        static ImageView imageView = new ImageView("file:D:\China.jpg");
        @Override
        public void start(Stage stage) throws Exception {
            Pane pane = new Pane();
            pane.getChildren().add(imageView);
            Scene scene = new Scene(pane,1000,600);
            stage.setTitle("Exercise30.3");
            stage.setScene(scene);
            stage.show();
            Runnable rising1 = new Rising();
            Thread thread1 = new Thread(rising1);
            thread1.start();
        }
        
        static class Rising implements Runnable{
    
            @Override
            public void run() {
                PathTransition pt = new PathTransition(Duration.millis(10000),new Line(400,200,400,0),imageView);
                pt.setCycleCount(5); 
                pt.play();
            }    
        }
        
        public static void  main(String[] args){
            Application.launch(args);
        }
    }
    用线程模拟更快!
    爱我没结果!
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  • 原文地址:https://www.cnblogs.com/angoli/p/12918758.html
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