Java GridBagLayout之后,JScrollPane滚动条不起作用

Java GridBagLayout之后,JScrollPane滚动条不起作用,java,mysql,database,jscrollpane,gridbaglayout,Java,Mysql,Database,Jscrollpane,Gridbaglayout,我正在为学校制作一个像Cleverbot这样的自动聊天客户端。我有两个问题。。。1) 由于某种原因,滚动条似乎不起作用。以下是一个屏幕截图: import javax.swing.*; 导入java.awt.*; 导入java.awt.event.KeyListener; 导入java.awt.event.KeyEvent; 导入java.lang.Math; 公共类ChatBot扩展了JFrame,实现了KeyListener{ //主要方法 公共静态void main(字符串[]args)

我正在为学校制作一个像Cleverbot这样的自动聊天客户端。我有两个问题。。。1) 由于某种原因,滚动条似乎不起作用。以下是一个屏幕截图:

import javax.swing.*;
导入java.awt.*;
导入java.awt.event.KeyListener;
导入java.awt.event.KeyEvent;
导入java.lang.Math;
公共类ChatBot扩展了JFrame,实现了KeyListener{
//主要方法
公共静态void main(字符串[]args){
新聊天机器人();
}
//回转设置
JPanel窗口=新的JPanel(){
受保护组件(图形g){
超级组件(g);
图像背景=新图像图标(“textfect.png”).getImage();
intx=(window.getWidth()-background.getWidth(null))/2;
int y=(window.getHeight()-background.getHeight(null))/2;
g、 drawImage(背景、x、y、空、此);
}
};
JLabel标签=新的JLabel(“说:”);
JTextArea dialog=新建JTextArea();
JTextField输入=新的JTextField(46);
JScrollPane scroll=新建JScrollPane(
对话
JScrollPane.VERTICAL\u滚动条\u根据需要,
JScrollPane.HORIZONTAL\u滚动条\u从不
);
//创建窗口并启动bot
公共聊天机器人(){
超级(“Pollockorator”);
设置大小(600400);
可设置大小(真);
setDefaultCloseOperation(关闭时退出);
对话框.setEditable(false);
对话框。setLineWrap(true);
对话框.setOpaque(false);
scroll.getViewport().setOpaque(false);
addKeyListener(这个);
添加(滚动);
添加(标签);
窗口。添加(输入);
//背景色;新颜色(97118131)是一种不错的颜色
窗口背景(新颜色(255、255、255));
添加(窗口);
setVisible(真);
//图形用户界面布局
setLayout(新的GridBagLayout());
GridBagConstraints c=新的GridBagConstraints();
c、 填充=GridBagConstraints.HORIZONTAL;
//对话
c、 权重x=1.0;
c、 权重y=1.0;
c、 anchor=GridBagConstraints.PAGE\u开始;
c、 fill=GridBagConstraints.BOTH;
c、 插图=新插图(10,10,0,10);
c、 gridx=0;
c、 gridy=0;
c、 网格宽度=3;
c、 网格高度=2;
添加(对话框,c);
//输入框
c、 权重x=0;
c、 权重=0;
c、 anchor=GridBagConstraints.PAGE\u END;
c、 填充=GridBagConstraints.HORIZONTAL;
c、 插图=新插图(0,0,10,10);
c、 gridx=1;
c、 gridy=2;
c、 gridwidth=GridBagConstraints.rements;
窗口。添加(输入,c);
//标签
c、 权重x=0;
c、 权重=0;
c、 anchor=GridBagConstraints.PAGE\u END;
c、 填充=GridBagConstraints.HORIZONTAL;
c、 插图=新插图(0,10,10,0);
c、 gridx=0;
c、 gridy=2;
c、 网格宽度=1;
添加(标签,c);
input.requestFocus();
}
//知识库
字符串[][]知识库={
{“嗨”,“你好”,“你好”,“嘿”},
{“嗨”,“你好”,“嗨”},
{“你好”、“你好”、“你好”、“你好”、“你好”},
{“好”,“做得好”},
{“闭嘴”、“noob”、“别说话”}
};
//按enter键时要做什么
按下公共无效键(按键事件e){
如果(例如getKeyCode()==KeyEvent.VK_ENTER){
input.setEditable(假);
//获取用户输入
String quote=input.getText();
input.setText(“”);
如果(!quote.equals(“”){
添加文本(“您:\t”+引号);
quote.trim();
而(quote.charAt(quote.length()-1)='!'| | quote.charAt(quote.length()-1)='。| | quote.charAt(quote.length()-1)='?'){
quote=quote.substring(0,quote.length()-1);
}
quote.trim();
字节响应=0;
int j=0;
//检查知识库中的匹配或更改主题
while(响应==0){
//如果找到匹配项,请回答
if(inArray(quote.toLowerCase(),知识库[j*2])){
响应=2;
int r=(int)Math.floor(Math.random()*知识库[(j*2)+1].length);
addText(“\nPollockorator:\t”+知识库[(j*2)+1][r]);
}
j++;
//如果未找到匹配项,请转到“更改主题”
如果(j*2==knowledgeBase.length-1&&response==0){
响应=1;
}
}
//如果bot丢失,请更改主题
如果(响应==1){
int r=(int)Math.floor(Math.random()*knowledgeBase[knowledgeBase.length-1].length);
addText(“\nPollockorator:\t”+knowledgeBase[knowledgeBase.length-1][r]);
}
添加文本(“\n”);
}
}
}
//其他活动
public void keyTyped(KeyEvent e){}
公共无效密钥已释放(密钥事件e){
如果(例如getKeyCode()==KeyEvent.VK_ENTER){
input.setEditable(真);
}
}
//格式化输入
公共void addText(字符串str){
dialog.setText(dialog.getText()+str);
}
//检查知识库是否匹配
公共布尔数组(字符串输入,字符串[]str){
布尔匹配=假;
对于(int i=0;i
)滚动条似乎不起作用

您需要将滚动窗格添加到窗口中,而不是dialaog。此外,在创建对话框时,您应该使用类似以下内容:

JTextArea dialog = new JTextArea(5, 30);
因此,可以以合理的大小创建文本区域

如果(例如getKeyCode()==KeyEvent.VK_ENTER){

不要使用KeyListener来侦听Enter键。而是将ActionListener添加到文本字段中。按下Enter键时将调用ActionListener。另外,为什么要切换文本字段的可编辑状态
import javax.swing.*;
import java.awt.*;

import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;

import java.lang.Math;

public class ChatBot extends JFrame implements KeyListener{
    //Main method
    public static void main(String[] args){
        new ChatBot();
    }
    //Swing settings
    JPanel window=new JPanel(){
        protected void paintComponent(Graphics g){
            super.paintComponent(g);
            Image background = new ImageIcon("textEffect.png").getImage();
            int x = (window.getWidth() - background.getWidth(null)) / 2;
            int y = (window.getHeight() - background.getHeight(null)) / 2;
            g.drawImage(background,x,y,null,this);
        }
    };
    JLabel label=new JLabel("Say: ");
    JTextArea dialog=new JTextArea(5,30);
    JTextField input=new JTextField(46);
    JScrollPane scroll=new JScrollPane(
        dialog,
        JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
        JScrollPane.HORIZONTAL_SCROLLBAR_NEVER
    );
    //Makes window and starts bot
    public ChatBot(){
        super("Pollockoraptor");
        setSize(600,400);
        setResizable(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        dialog.setEditable(false);
        dialog.setLineWrap(true);
        dialog.setOpaque(false);
        scroll.getViewport().setOpaque(false);
        input.addKeyListener(this);
        window.add(scroll);
        //background color; new Color(97, 118, 131) is a nice color
        window.setBackground(new Color(255, 255, 255));
        add(window);
        setVisible(true);
        //Gui Layout
        window.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        //Dialog
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.anchor = GridBagConstraints.PAGE_START;
        c.fill = GridBagConstraints.BOTH;
        c.insets = new Insets(10, 10, 0, 10);
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 3;
        c.gridheight = 2;
        window.add(scroll, c);
        //Input box
        c.weightx = 0;
        c.weighty = 0;
        c.anchor = GridBagConstraints.PAGE_END;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.insets = new Insets(0, 0, 10, 10);
        c.gridx = 1;
        c.gridy = 2;
        c.gridwidth = GridBagConstraints.REMAINDER;
        window.add(input, c);
        //Label
        c.weightx = 0;
        c.weighty = 0;
        c.anchor = GridBagConstraints.PAGE_END;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.insets = new Insets(0, 10, 10, 0);
        c.gridx = 0;
        c.gridy = 2;
        c.gridwidth = 1;
        window.add(label, c);
        input.requestFocus();
    }
    //knowledgeBase
    String[][] knowledgeBase={
        {"hi","hello","howdy","hey"},
        {"hi","hello","hey"},
        {"how are you", "how r u", "how r you", "how are u"},
        {"good","doing well"},
        {"shut up","noob","stop talking"}
    };
    //What to do when enter is pressed
    public void keyPressed(KeyEvent e){
        if(e.getKeyCode()==KeyEvent.VK_ENTER){
            input.setEditable(false);
            //get the user input
            String quote=input.getText();
            input.setText("");
            if(!quote.equals("")){
                addText("You:\t"+quote);
                quote.trim();
                while(quote.charAt(quote.length()-1)=='!' || quote.charAt(quote.length()-1)=='.' || quote.charAt(quote.length()-1)=='?'){
                    quote=quote.substring(0,quote.length()-1);
                }
                quote.trim();
                byte response=0;
                int j=0;
                //check the knowledgeBase for a match or change topic
                while(response==0){
                    //if a match is found, reply with the answer
                    if(inArray(quote.toLowerCase(),knowledgeBase[j*2])){
                        response=2;
                        int r=(int)Math.floor(Math.random()*knowledgeBase[(j*2)+1].length);
                        addText("\nPollockoraptor:\t"+knowledgeBase[(j*2)+1][r]);
                    }
                    j++;
                    //if a match is not found, go to change topic
                    if(j*2==knowledgeBase.length-1 && response==0){
                        response=1;
                    }
                }
                //change topic if bot is lost
                if(response==1){
                    int r=(int)Math.floor(Math.random()*knowledgeBase[knowledgeBase.length-1].length);
                    addText("\nPollockoraptor:\t"+knowledgeBase[knowledgeBase.length-1][r]);
                }
                addText("\n");
            }
        }
    }
    //other events
    public void keyTyped(KeyEvent e){}
    public void keyReleased(KeyEvent e){
        if(e.getKeyCode()==KeyEvent.VK_ENTER){
            input.setEditable(true);
        }
    }
    //format the input
    public void addText(String str){
        dialog.append(str);
    }
    //check the knowledgeBase for a match
    public boolean inArray(String in,String[] str){
        boolean match=false;
        for(int i=0;i<str.length;i++){
            if(str[i].equals(in)){
                match=true;
            }
        }
        return match;
    }
}
import javax.swing.*;
import java.awt.*;

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

import java.lang.Math;

public class ChatBot extends JFrame implements ActionListener{
    //Main method
    public static void main(String[] args){
        new ChatBot();
    }
    //Swing settings
    JPanel window=new JPanel(){
        protected void paintComponent(Graphics g){
            super.paintComponent(g);
            Image background = new ImageIcon("textEffect.png").getImage();
            int x = (window.getWidth() - background.getWidth(null)) / 2;
            int y = (window.getHeight() - background.getHeight(null)) / 2;
            g.drawImage(background,x,y,null,this);
        }
    };
    JLabel label=new JLabel("Say: ");
    JTextArea dialog=new JTextArea(5,30);
    JTextField input=new JTextField(46);
    JScrollPane scroll=new JScrollPane(
        dialog,
        JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
        JScrollPane.HORIZONTAL_SCROLLBAR_NEVER
    );
    //Makes window and starts bot
    public ChatBot(){
        super("Pollockoraptor");
        setSize(600,400);
        setResizable(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        dialog.setEditable(false);
        dialog.setLineWrap(true);
        dialog.setOpaque(false);
        scroll.getViewport().setOpaque(false);
        input.addActionListener(this);
        window.add(scroll);
        //background color; new Color(97, 118, 131) is a nice color
        window.setBackground(new Color(255, 255, 255));
        add(window);
        setVisible(true);
        //Gui Layout
        window.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.HORIZONTAL;
        //Dialog
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.anchor = GridBagConstraints.PAGE_START;
        c.fill = GridBagConstraints.BOTH;
        c.insets = new Insets(10, 10, 0, 10);
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 3;
        c.gridheight = 2;
        window.add(scroll, c);
        //Input box
        c.weightx = 0;
        c.weighty = 0;
        c.anchor = GridBagConstraints.PAGE_END;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.insets = new Insets(0, 0, 10, 10);
        c.gridx = 1;
        c.gridy = 2;
        c.gridwidth = GridBagConstraints.REMAINDER;
        window.add(input, c);
        //Label
        c.weightx = 0;
        c.weighty = 0;
        c.anchor = GridBagConstraints.PAGE_END;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.insets = new Insets(0, 10, 10, 0);
        c.gridx = 0;
        c.gridy = 2;
        c.gridwidth = 1;
        window.add(label, c);
        input.requestFocus();
    }
    //knowledgeBase
    String[][] knowledgeBase={
        {"hi","hello","howdy","hey"},
        {"hi","hello","hey"},
        {"how are you", "how r u", "how r you", "how are u"},
        {"good","doing well"},
        {"shut up","noob","stop talking"}
    };
    //What to do when enter is pressed
    public void actionPerformed(ActionEvent e){
        //get the user input
        String quote=input.getText();
        input.setText("");
        if(!quote.equals("")){
            addText("You:\t"+quote);
            quote.trim();
            while(quote.charAt(quote.length()-1)=='!' || quote.charAt(quote.length()-1)=='.' || quote.charAt(quote.length()-1)=='?'){
                quote=quote.substring(0,quote.length()-1);
            }
            quote.trim();
            byte response=0;
            int j=0;
            //check the knowledgeBase for a match or change topic
            while(response==0){
                //if a match is found, reply with the answer
                if(inArray(quote.toLowerCase(),knowledgeBase[j*2])){
                    response=2;
                    int r=(int)Math.floor(Math.random()*knowledgeBase[(j*2)+1].length);
                    addText("\nPollockoraptor:\t"+knowledgeBase[(j*2)+1][r]);
                }
                j++;
                //if a match is not found, go to change topic
                if(j*2==knowledgeBase.length-1 && response==0){
                    response=1;
                }
            }
            //change topic if bot is lost
            if(response==1){
                int r=(int)Math.floor(Math.random()*knowledgeBase[knowledgeBase.length-1].length);
                addText("\nPollockoraptor:\t"+knowledgeBase[knowledgeBase.length-1][r]);
            }
            addText("\n");
        }
    }
    //format the input
    public void addText(String str){
        dialog.append(str);
    }
    //check the knowledgeBase for a match
    public boolean inArray(String in,String[] str){
        boolean match=false;
        for(int i=0;i<str.length;i++){
            if(str[i].equals(in)){
                match=true;
            }
        }
        return match;
    }
}
window.add(dialog, c);
JTextArea dialog = new JTextArea(5, 30);
public ChatBot() {
  super("Pollockoraptor");
  setSize(600, 400);
  setResizable(true);
  setDefaultCloseOperation(EXIT_ON_CLOSE);
  dialog.setEditable(false);
  dialog.setLineWrap(true);
  dialog.setOpaque(false);
  scroll.getViewport().setOpaque(false);
  input.addKeyListener(this);

  // **** adding a bunch of junk **without** constraings??
  window.add(scroll);  // *** add scrollpane *with* dialog here
  window.add(label);
  window.add(input);

  // .....

  GridBagConstraints c = new GridBagConstraints();
  c.fill = GridBagConstraints.HORIZONTAL;
  // Dialog
  c.weightx = 1.0;
  c.weighty = 1.0;
  c.anchor = GridBagConstraints.PAGE_START;
  c.fill = GridBagConstraints.BOTH;
  c.insets = new Insets(10, 10, 0, 10);
  c.gridx = 0;
  c.gridy = 0;
  c.gridwidth = 3;
  c.gridheight = 2;
  window.add(dialog, c); // *** then add dialog by itself*** ???? WTF???