Question

我正在尝试用Java构建一个内置30个代码的程序，如果用户从1到30定义了他想要的代码，那么将向他显示一个特定的代码。到目前为止，我仍然坚持要从数组中获取数据（6位数字）。也许你们中的一些人可以给我一些建议吗？

代码：

package koodibaas;

import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class koodibaas extends Frame implements ActionListener {
    private static final long serialVersionUID = 1L;
    private TextField tfCount;
    private Label lblCount;
    private Button btnCount;

    public koodibaas() {
        setLayout(new FlowLayout());

        lblCount = new Label("ENTER CODE?");
        add(lblCount);

        tfCount = new TextField("0", 10);
        add(tfCount);

        btnCount = new Button("GIVE ANSWER");
        add(btnCount);
        btnCount.addActionListener(this);

        setTitle("koodibaas");
        setSize(400, 150);
        setVisible(true);
    }

    public static void second(String[] args) {
        int[] array = new int[30];
        array[0] = 111111;
        array[1] = 888888;
        array[2] = 333333;
        array[3] = 555555;
        array[4] = 111111;
        array[5] = 643208;
        array[6] = 643208;
        array[7] = 643208;
        array[8] = 643208;
        array[9] = 643208;
        array[10] = 643208;
        array[11] = 643208;
        array[12] = 643208;
        array[13] = 643208;
        array[14] = 643208;
        array[15] = 643208;
        array[16] = 643208;
        array[17] = 643208;
        array[18] = 643208;
        array[19] = 643208;
        array[20] = 643208;
        array[21] = 643208;
        array[22] = 643208;
        array[23] = 643208;
        array[24] = 643208;
        array[25] = 643208;
        array[26] = 643208;
        array[27] = 643208;
        array[28] = 643208;
        array[29] = 643208;
    }

    public static void main(String[] args) {
        koodibaas app = new koodibaas(); 
    }

    @Override
    public void actionPerformed(ActionEvent evt) {
        tfCount.setText(); 
    }
}

Answer 1

在

之外定义你的数组

int[] array;

并通过调用第二种方法对其进行初始化。

并从按钮onclick事件访问数组

int number=Integer.parseInt(tfCount.getText());
tfCount.setText(String.valueOf(array[number]));

第二种方法不需要是静态方法，也不需要参数

最后代码应该是

public class koodibaas extends Frame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private int[] array;

    private TextField tfCount;

    private Label lblCount;

    private Button btnCount;

    public koodibaas() {
        setLayout(new FlowLayout());

        lblCount = new Label("ENTER CODE?");

        add(lblCount);
        tfCount = new TextField("0", 10);
        add(tfCount);

        btnCount = new Button("GIVE ANSWER");
        add(btnCount);

        btnCount.addActionListener(this);

        setTitle("koodibaas");
        setSize(400, 150);
        setVisible(true);
        second(); // call second to initialize array 

    }

    public void second() {
        array = new int[30];
        array[0] = 111111;
        array[1] = 888888;
        array[2] = 333333;
        array[3] = 555555;
        array[4] = 111111;
        array[5] = 643208;
        array[6] = 643208;
        array[7] = 643208;
        array[8] = 643208;
        array[9] = 643208;
        array[10] = 643208;
        array[11] = 643208;
        array[12] = 643208;
        array[13] = 643208;
        array[14] = 643208;
        array[15] = 643208;
        array[16] = 643208;
        array[17] = 643208;
        array[18] = 643208;
        array[19] = 643208;
        array[20] = 643208;
        array[21] = 643208;
        array[22] = 643208;
        array[23] = 643208;
        array[24] = 643208;
        array[25] = 643208;
        array[26] = 643208;
        array[27] = 643208;
        array[28] = 643208;
        array[29] = 643208;

    }

    public static void main(String[] args) {
        koodibaas app = new koodibaas();
    }

    @Override
    public void actionPerformed(ActionEvent evt) {

        int number = Integer.parseInt(tfCount.getText());
        tfCount.setText(String.valueOf(array[number]));
    }

}

在Java中从数组中获取用户定义的数据

1 个答案: