我对java还是个新手,所以愚蠢的问题来了。我一直在开发一个简单的软件,使用 JFrame
、PrintWriter
、File
和 Scanner
来创建和读取一个文本文件,我使用您输入的名称保存该文件,然后使用您输入到 JTextField 的数据保存该文件,问题是:只要您输入一个空格,它就不会保存之后的文本.txt
文件的空间:
输入
waitFor it
WriteToFile(textarea.getText(), name.getText());
// my function input text name
输出:
waitFor
但是如果我这样手动输入文本:
WriteToFile("waitFor it", name.getText());
// my function input text name
输出:
waitFor it
这让我认为我的功能可能不会导致这种情况,但我又是一个菜鸟。
Main.java
package creator;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import library.Database;
public class Main extends Database{
public static void main(String[] args) {
JFrame frame = new JFrame();
JButton button = new JButton("Erase");
JButton button2 = new JButton("Add");
JButton button3 = new JButton("Save to Database");
Font font = new Font("Courier", Font.BOLD, 12);
Font font2 = new Font("Courier", Font.BOLD, 14);
final JTextField name = new JTextField();
final JTextField editorPane = new JTextField();
final JTextField textarea = new JTextField();
final JScrollPane scroll = new JScrollPane (textarea,
JScrollPane.VERTICAL_SCROLLBAR_NEVER, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.setTitle("Array Creator");
frame.setSize(401, 250);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setResizable(false);
frame.setLayout(null);
frame.add(button);
frame.add(name);
frame.add(button2);
frame.add(button3);
frame.add(editorPane);
frame.add(scroll);
button.setBounds(0, 200, 80, 22);
name.setBounds(82, 200, 80, 22);
button2.setBounds(164, 200, 80, 22);
button3.setBounds(246, 200, 148, 22);
editorPane.setBounds(100,175,200,18);
scroll.setBounds(50, 10, 300, 160);
textarea.setEditable(false);
button.setFont(font);
name.setFont(font);
button2.setFont(font);
button3.setFont(font);
editorPane.setFont(font);
textarea.setFont(font2);
textarea.setText("[");
frame.setVisible(true);
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
textarea.setText("[");
editorPane.setText("");
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
textarea.setText(textarea.getText()+"["+editorPane.getText()+"],");
editorPane.setText("");
}
});
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
String temp = textarea.getText();
temp = temp.substring(0, temp.length()-1);
textarea.setText(temp+"]");
editorPane.setText("");
WriteToFile(textarea.getText(), name.getText());
}
});
name.addKeyListener(new KeyListener() {
public void keyTyped(KeyEvent arg0) {
}
public void keyReleased(KeyEvent arg0) {
textarea.setText(readFile(name.getText()));
}
public void keyPressed(KeyEvent arg0) {
}
});
}
}
Database.java
package library;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.Scanner;
public class Database {
public static String WriteToFile(String data, String name){
String output = "ERROR";
PrintWriter writer = null;
try {
writer = new PrintWriter(name+".txt", "UTF-8");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
writer.println(data);
writer.close();
File file = new File(name+".txt");
try {
@SuppressWarnings("resource")
Scanner sc = new Scanner(file);
output = sc.next();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return output;
}
public static String readFile(String name){
String output = "[";
File file = new File(name+".txt");
try {
@SuppressWarnings("resource")
Scanner sc = new Scanner(file);
output = sc.next();
} catch (FileNotFoundException e) {
}
return output;
}
}
有人可以向我解释一下这是为什么吗?
最佳答案
关于java - java中字符串有空格时无法获取整个字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35479451/