JOptionPane输出文本副本

Question

我没有经验,JOptionpane但我需要一个简单的程序来简化我的生活.我需要帮助的代码如下:

public static void main (String[] args) {
    String input = "";

    input = JOptionPane.showInputDialog("Enter code");

    JOptionPane.showMessageDialog(null, toStringU(toArray(input)), "RESULT",
            JOptionPane.INFORMATION_MESSAGE);

}

toStringU 方法给了我很长的文字

我想在没有任何编译器的情况下运行它(独立应用程序,双击,放置信息并获取结果).

我无法复制输出面板的结果,我需要复制它.所以要么我需要复制它和/或我想将它写入txt文件(第二个会很棒).

Answer 1

JOptionPane允许你指定一个Object作为消息参数,如果这个值是Component某种类型,它将被添加到JOptionPane(Strings被JLabel自动渲染)

通过设置一个JTextArea不可编辑的东西,你可以利用它的复制功能,而你需要做更多的工作......

import java.awt.EventQueue;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestOptionPane11 {

    public static void main(String[] args) {
        new TestOptionPane11();
    }

    public TestOptionPane11() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JTextArea ta = new JTextArea(10, 10);
                ta.setText("This is some really long text that is likely to run over "
                        + "the viewable area and require some additional space to render "
                        + "properly, but you should be able to select and copy parts or "
                        + "whole sections of the text as you, but it should remain "
                        + "no editable...");
                ta.setWrapStyleWord(true);
                ta.setLineWrap(true);
                ta.setCaretPosition(0);
                ta.setEditable(false);

                JOptionPane.showMessageDialog(null, new JScrollPane(ta), "RESULT", JOptionPane.INFORMATION_MESSAGE);

            }
        });
    }
}

额外的副作用

另一个副作用是,它实际上JTextArea可以将它的内容写入Writer给你...

FileWriter writer = null;
try {
    writer = new FileWriter("SomeoutputFile.txt", false);
    ta.write(writer);
} catch (IOException exp) {
    exp.printStackTrace();
} finally {
    try {
        writer.close();
    } catch (Exception e) {
    }
}

这也允许你写一个文件......