我在这里想要完成的是将 JTextArea 添加到我预先存在的 JPanel 中。当我运行该程序时,它实际上将其添加到我正在查找的 JPanel 中,但它将 JTextArea 放在 JPanel 后面,直到我单击它应该所在的区域。如果我单击添加到与我遇到问题的 JPanel 相同的 JTextArea 的另一个 JTextArea,则会显示整个 JTextArea。
// Once program works as intended, use CardLayout to switch screens, rather than using JFrame with setVisible(true/false)
// JPanels. Tutorial left on Stackoverflow with example code. 12/31/15
import java.awt.BorderLayout;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class UserInterface implements ActionListener
{
JFrame screen;
JButton start, submit, help;
JPanel UI,userWhite, passWhite;
JLabel usrTxt, passTxt;
JTextArea usrInput, passInput, console;
static String[] strings = new String[2]; //See getInformation() method
HELP runner = new HELP();
public static void main(String args[])
{
UserInterface userinterface = new UserInterface();
userinterface.uiSetup();
userinterface.displaySetup();
userinterface.inputSetup();
userinterface.consoleSetup();
}
public void run()
{
uiSetup();
displaySetup();
inputSetup();
consoleSetup();
}
public void uiSetup()
{
// This method sets up the initial interface which all other
// elements within this program will be built off of
screen = new JFrame("Bing Rewards Bot v.Development 1.0");
screen.setVisible(true);
screen.setSize(800, 600);
screen.setResizable(false);
screen.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
screen.getContentPane().setLayout(new BorderLayout());
UI = new JPanel();
UI.setVisible(true);
UI.setLayout(null);
UI.setBackground(Color.CYAN);
screen.add(UI);
// Buttons must me initialized here. If done in another method,
// it can sometimes block JPanels from appearing. Fixed: 12/27/15
start = new JButton("Start Bot");
start.setVisible(true);
start.setFocusable(false);
start.setBounds(150,500,200,75);
UI.add(start);
submit = new JButton("Submit");
submit.setVisible(true);
submit.setFocusable(false);
submit.setBounds(75,170,100,50);
UI.add(submit);
help = new JButton("HELP");
help.setVisible(true);
help.setFocusable(false);
help.setBounds(455,500,200,75);
help.setActionCommand("helpClicked");
help.addActionListener(this);
UI.add(help);
}
public void displaySetup()
{
// This method sets up the interface text
usrTxt = new JLabel("Bing/Microsoft Account Username");
usrTxt.setFont(new Font("Monospaced", Font.BOLD, 16));
usrTxt.setForeground(Color.BLACK);
usrTxt.setBounds(0,0,310,20); // Adjusts Absolute Size
usrTxt.setLocation(25,50); // Sets Location
UI.add(usrTxt);
passTxt = new JLabel("Password");
passTxt.setFont(new Font("Monospaced", Font.BOLD, 16));
passTxt.setForeground(Color.BLACK);
passTxt.setBounds(0,0,310,20);
passTxt.setLocation(25,100);
UI.add(passTxt);
}
public void consoleSetup()
{
//TODO Appearing behind JPanel: UI
console = new JTextArea("Bing Rewards Bot v.Development 1.1\nInterface Loaded Sucessfully. Awaiting User Input...");
console.setSize(700,200);
console.setLocation(25,260);
console.setBackground(Color.WHITE);
console.setForeground(Color.BLACK);
console.setVisible(true);
console.setEditable(false);
// console.setText("01/02/16//:: Initalizing JTextArea()");
UI.add(console);
}
public void inputSetup()
{
// This method handles the User name and Password field setup
userWhite = new JPanel();
userWhite.setVisible(true);
userWhite.setBackground(Color.WHITE);
userWhite.setLocation(25,70);
userWhite.setSize(200,25);
UI.add(userWhite);
passWhite = new JPanel();
passWhite.setVisible(true);
passWhite.setBackground(Color.WHITE);
passWhite.setLocation(25,120);
passWhite.setSize(200,25);
UI.add(passWhite);
usrInput = new JTextArea();
usrInput.setBounds(0,0,200,18);
usrInput.setLocation(25,75);
usrInput.setBackground(Color.WHITE);
usrInput.setForeground(Color.BLACK);
UI.add(usrInput);
passInput = new JTextArea();
passInput.setBounds(0,0,200,18);
passInput.setLocation(25,125);
passInput.setBackground(Color.WHITE);
passInput.setForeground(Color.BLACK);
UI.add(passInput);
}
public void getInformation()
{
// This method gets the information from the
// JTextAreas in the inputSetup method and
// stores it into an array called "strings"
// ("strings" is initialized in the class)
strings[0] = usrInput.getText();
strings[1] = passInput.getText();
}
public void actionPerformed(ActionEvent e){
if (e.getActionCommand().equals("helpClicked"))
{
UI.setVisible(false);
runner.helpSetup(screen);
}
}
另外,是否需要向 JTextArea 添加滚动 Pane ?我以前从未使用过 JTextAreas,所以我想一旦程序按预期工作,我就会添加它。
最佳答案
What I'm trying to accomplish here is adding a JTextArea to my pre-existing JPanel
嗯,我不知道你在谈论代码的哪一部分。我们没有时间阅读您的整个代码来理解逻辑。
所以我所能做的就是发表一般性评论:
1) GUI可见后添加组件的基本代码是:
panel.add( someComponent );
panel.revalidate();
panel.repaint();
2) 不要使用空布局。 Swing 被设计为与布局管理器一起使用,原因太多,无法在此处列出。
3) 变量名称不应以大写字符开头。你们中的大多数人的名字都是正确的,但也有一些不正确。保持一致!!!
4) 在使框架可见之前,应将组件添加到框架中。
5) GUI 应在事件调度线程 (EDT) 上创建。
也许可以从 Layout Manager 上的 Swing 教程开始了解基本的 Swing 信息以及工作演示,这些演示将向您展示如何更好地构建代码。
关于java - JTextArea 在添加到 JPanel 时隐藏,直到单击为止,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34572065/