如何让我的按钮选择一个随机单词，然后再

Question

I've written a program to print out a random word and its definition to a text field when the button is pressed once. I want to have it to print another random word and definition when The button is pressed repeatedly. Any Ideas? I am new to coding so please take that into consideration.

This is what I have so far:

public class RandomWord extends JFrame{
private JTextField wordField;
private JTextField defField;
private JButton nextButton;
private String words[] = {"Petrichor:",//0
                        "Iterate:",//1
                        "Absquatulate:",//2
                        "Anhuiliform:",//3
                        "Argle-bargle:","Argus-eyed:",//4
                        "Automy:",//5
                        "Benthos:",//6
                        "Bibliopole:",//7
                        "Bilboes:",//8
                        "Bruxism:",//9
                        "Borborygmus:",//10
                        "Calipygian:",//11
                        "Callithumpian:",//12
                        "Cereology:",//13
                        "Chad:",//14
                        "Chiliad:"};//15

private String def[] = {"The smell of earth after rain.",//0
                        "To utter or perform repeatedly.",//1
                        "To leave somewhere abruptly.",//2
                        "Resembling an eel.",//3
                        "Copious but meaningless talk or writing.",//4
                        "Vigilant, refering to Argos a Greek mythological watchman with a hundred eyes.",//5
                        "The casting off of a limb or other part of the body by an animal under threat, such as a lizard.",//6
                        "The flora and faunda on the bottom of a sea or lake.",//7
                        "A person who buys and sells books, especially rare ones",//8
                        "An iron bar with sliding shackles, used to fasten prisoners' ankles.",//9
                        "Involantary and habitual grinding of the teeth.",//10
                        "A rumbling or gurgling noise in the intestines.",//11
                        "Having shapely buttocks.","Like a discordant band or a noisy parade.",//12
                        "The study or investigation of crop circles.",//13
                        "A piece of waste paper produced by punching a hole.",//14
                        "A thousand things or a thousand years."};//15

public RandomWord(){
    super("Cool Words -1.5");
    setLayout(new FlowLayout());

    int idx = new Random().nextInt(words.length);
    final String randomWord = words[idx];
    final String randomDef = def[idx];

    wordField = new JTextField("Petrichor",20);
    add(wordField);
    defField = new JTextField("The smell of earth after rain",20);
    add(defField);
    nextButton = new JButton("Next");
    add(nextButton);

    nextButton.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent arg0) {
            wordField.setText(randomWord);
            defField.setText(randomDef);

        }
    });
}

}

Answer 1

You are choosing the random word and definition at the constructor was called. You must to change this to choose the random word and definition when you are click with mouse (inside actionPerformed method).

Try with this:

public RandomWord(){
    super("Cool Words -1.5");
    setLayout(new FlowLayout());

    wordField = new JTextField("Petrichor",20);
    add(wordField);
    defField = new JTextField("The smell of earth after rain",20);
    add(defField);
    nextButton = new JButton("Next");
    add(nextButton);

    nextButton.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent arg0) {

            // this method is executed when you clicked;
            // The random word and definition must be choose at this moment.
            int idx = new Random().nextInt(words.length);
            wordField.setText(words[idx];);
            defField.setText(def[idx]);

        }
    });
}

Answer 2

Try removing the final keyword in your Strings. Final denotes that the String value cannot be changed after its declaration:

   String randomWord = words[idx];

   String randomDef = def[idx];