Question

我一直在努力为这个JButton编写if else语句。我试图让这个Jbutton调用计算方法
我正在使用Eclipse，这是Java

import java.awt.EventQueue;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.text.JTextComponent;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.File;

public class DirectorySize {

protected static final JTextComponent filelist = null;
private JFrame frame;
private JTextField textField;
private JTextField sizeOutput;
protected File file;
protected Object path;
protected long size;
protected Object getContenPane;
protected Object directory;
private int totalFolder;
private int totalFile;



/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                DirectorySize window = new DirectorySize();
                window.frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 */
public DirectorySize() {
    initialize();
}

/**
 */
private void initialize() {
    frame = new JFrame();
    frame.setBounds(100, 100, 553, 144);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);

    textField = new JTextField();
    textField.setBounds(10, 11, 402, 35);
    frame.getContentPane().add(textField);
    textField.setColumns(10);

    //JFileChooser to open directory
    JButton directoryButton = new JButton("Directory");
    directoryButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

            JFileChooser chooser = new JFileChooser();
            chooser.setFileHidingEnabled(true);
            chooser.setMultiSelectionEnabled(false);
            chooser.setFileSelectionMode    
                           (JFileChooser.DIRECTORIES_ONLY);
            chooser.setDialogType(JFileChooser.OPEN_DIALOG);
            int state = chooser.showOpenDialog(frame);
            if (state == JFileChooser.APPROVE_OPTION )

    textField.setText(chooser.getSelectedFile().getAbsolutePath());

        }
    });
    directoryButton.setBounds(422, 17, 105, 23);
    frame.getContentPane().add(directoryButton);

    //Jbutton to calculate directory size when pressed
    JButton sizeReader = new JButton("Calculate Size");
    sizeReader.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {

            String sizeReader = sizeOutput.getText();
            String fs = "foldersize";
                if(fs == sizeReader){

                }else{


            //sizeOutput.setText(sizeOutput.getText() + totalFolder);
                }
        }
    });
    sizeReader.setBounds(10, 57, 131, 38);
    frame.getContentPane().add(sizeReader);

    sizeOutput = new JTextField();
    sizeOutput.setEditable(false);
    sizeOutput.setBounds(151, 57, 261, 38);
    frame.getContentPane().add(sizeOutput);
    sizeOutput.setColumns(10);

    // exit button for frame
    JButton btnNewButton_2 = new JButton("Exit");
    btnNewButton_2.addActionListener(new ActionListener() {
        private Object exitButton;
        public void actionPerformed(ActionEvent arg0) {

            System.exit(0);

            this.add(exitButton);
        }

        private void add(Object exitButton2) {

        }
    });
    btnNewButton_2.setBounds(422, 65, 105, 23);
    frame.getContentPane().add(btnNewButton_2);

}

  //Calculation method for the directories
  public long getFileSize(File folder) { 
    totalFolder++;  
    System.out.println("Folder: " + folder.getName()); 
    long foldersize = 0; 

    File[] filelist = folder.listFiles(); 
    for (int i = 0; i < filelist.length; i++) { 
        if (filelist[i].isDirectory()) { 
            foldersize += getFileSize(filelist[i]); 
        } else { 
            totalFile++; 
            foldersize += filelist[i].length(); 
        } 
    } 
    return foldersize; 
} 
public int getTotalFolder() { 
    return totalFolder; 
} 
public int getTotalFile() { 
    return totalFile; 
} 
   }

有人可以帮助我，告诉我我做错了什么或者我需要做什么谢谢你的帮助

Answer 1

尝试以下方法：

String SizeReader = SizeOutput.getText().toLowerCase();
if(fs.toLowerCase().equals(SizeReader))
{

}
else
{

}

无法想象如何使用Jbutton调用方法

1 个答案: