Java JTextField丢失,布局错误地放置JButtons
我正在尝试使用BorderLayout将一些元素组合成一个JPanel。 我在中心有一个JSlider,如果调用该构造函数,则在西部有一个名称。然后在东部我有另一个控制滑块的面板,这个面板给出了所有的问题 在东面板上,我想要一个JTextField和两个堆叠的按钮。我把JTextField放在中间,然后在东边有一个子面板,它把按钮放在北/南,使它们堆叠起来 当我运行程序时,东面板缺少JTextField,按钮的行为就像分别设置为西/东,而不是北/南 下面是我编写并查看了好几个小时的代码:Java JTextField丢失,布局错误地放置JButtons,java,swing,layout,layout-manager,Java,Swing,Layout,Layout Manager,我正在尝试使用BorderLayout将一些元素组合成一个JPanel。 我在中心有一个JSlider,如果调用该构造函数,则在西部有一个名称。然后在东部我有另一个控制滑块的面板,这个面板给出了所有的问题 在东面板上,我想要一个JTextField和两个堆叠的按钮。我把JTextField放在中间,然后在东边有一个子面板,它把按钮放在北/南,使它们堆叠起来 当我运行程序时,东面板缺少JTextField,按钮的行为就像分别设置为西/东,而不是北/南 下面是我编写并查看了好几个小时的代码: imp
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
/*
Made by vzybilly
Look of class:
____________________________________________________
| | | | [+] |
| <Name, if called>: | <Slider> | <Text box> | |
| | | | [-] |
----------------------------------------------------
*/
public class AdjustableSlider extends JPanel implements javax.swing.event.ChangeListener, ActionListener{
//slider for mouse input of values
private JSlider me;
//text box for manual input of values
private JTextField val;
//Make a slider with a textbox on the right and control buttons more right for 1 movement, buttons are stacked.
public AdjustableSlider(int min, int max, int cur, int spacing){
setLayout(new BorderLayout(0, 0));
me = new JSlider();
me.setName("");
me.setMinimum(min);
me.setPaintLabels(true);
me.setPaintTicks(true);
me.setMajorTickSpacing(spacing);
me.setMaximum(max);
me.setValue(cur);
me.addChangeListener(this);
add(me, BorderLayout.CENTER);
JPanel adjusters = new JPanel();
{
adjusters.setLayout(new BorderLayout(0, 0));
val = new JTextField(""+cur, (""+max).length());
val.addActionListener(this);
adjusters.add(val, BorderLayout.CENTER);
JPanel adjustersSub = new JPanel();
{
adjusters.setLayout(new BorderLayout(0, 0));
JButton up = new JButton("+");
up.addActionListener(
new ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt) {
me.setValue(me.getValue()+1);}});
JButton down = new JButton("-");
down.addActionListener(
new ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt) {
me.setValue(me.getValue()-1);}});
adjustersSub.add(up, BorderLayout.NORTH);
adjustersSub.add(down, BorderLayout.SOUTH);
}
adjusters.add(adjustersSub, BorderLayout.EAST);
}
add(adjusters, BorderLayout.EAST);
}
//add a name label to the Slider.
public AdjustableSlider(int min, int max, int cur, int spacing, String name){
this(min, max, cur, spacing);
add(new JLabel(name+":"), BorderLayout.WEST);}
//slider updated, reflect.
public void stateChanged(javax.swing.event.ChangeEvent e){
System.out.println("Slid: " + me.getValue());
val.setText(""+me.getValue());}
//textbox updated, reflect.
public void actionPerformed(java.awt.event.ActionEvent evt) {
System.out.println("Type: " + val.getText());
try{int t = Integer.parseInt(val.getText());
if(me.getValue()!=t) me.setValue(t);}
catch(Exception e){e.printStackTrace();}}
//get the current value of this slider
public int get(){
return me.getValue();}
}
编辑:我已经做了更正并修复了一些涉及文本字段更新和正在更新的错误,新代码如下
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.BorderLayout;
import java.awt.event.ActionListener;
/*
Made by vzybilly
Look of class:
____________________________________________________
| | | | [+] |
| <Name, if called>: | <Slider> | <Text box> | |
| | | | [-] |
----------------------------------------------------
*/
public class AdjustableSlider extends JPanel{
//slider for mouse input of values
private JSlider me;
//text box for manual input of values
private JTextField val;
//Make a slider with a textbox on the right and control buttons more right for 1 movement, buttons are stacked.
public AdjustableSlider(int min, int max, int cur, int spacing){
setLayout(new BorderLayout(0, 0));
me = new JSlider();
me.setName("");
me.setMinimum(min);
me.setPaintLabels(true);
me.setPaintTicks(true);
me.setMajorTickSpacing(spacing);
me.setMaximum(max);
me.setValue(cur);
me.addChangeListener(
new javax.swing.event.ChangeListener(){
public void stateChanged(javax.swing.event.ChangeEvent e){
try{
if(val.getText().length()<1||Integer.parseInt(val.getText())!=me.getValue())
val.setText(""+me.getValue());}
catch(NumberFormatException nfe){val.setText(""+me.getValue());}}});
add(me, BorderLayout.CENTER);
JPanel adjusters = new JPanel();
{
adjusters.setLayout(new BorderLayout(0, 0));
val = new JTextField(""+cur, (""+max).length());
val.addCaretListener(
new javax.swing.event.CaretListener(){
public void caretUpdate(javax.swing.event.CaretEvent ce){
try{int t = Integer.parseInt(val.getText());
if(me.getValue()!=t) me.setValue(t);}
catch(NumberFormatException nfe){/*System.out.println("null input to box");*/}
catch(Exception e){e.printStackTrace();}}});
adjusters.add(val, BorderLayout.CENTER);
JPanel adjustersSub = new JPanel();
{
adjustersSub.setLayout(new BorderLayout(0, 0));
JButton up = new JButton("+");
up.addActionListener(
new ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt) {
me.setValue(me.getValue()+1);}});
JButton down = new JButton("-");
down.addActionListener(
new ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt) {
me.setValue(me.getValue()-1);}});
adjustersSub.add(up, BorderLayout.NORTH);
adjustersSub.add(down, BorderLayout.SOUTH);
}
adjusters.add(adjustersSub, BorderLayout.EAST);
}
add(adjusters, BorderLayout.EAST);
}
//add a name label to the Slider.
public AdjustableSlider(int min, int max, int cur, int spacing, String name){
this(min, max, cur, spacing);
add(new JLabel(name+":"), BorderLayout.WEST);}
//get the current value of this slider
public int get(){
return me.getValue();}
}
import javax.swing.JPanel;
导入javax.swing.JSlider;
导入javax.swing.JLabel;
导入javax.swing.JTextField;
导入javax.swing.JButton;
导入java.awt.BorderLayout;
导入java.awt.event.ActionListener;
/*
由vzybilly制作
职业形象:
____________________________________________________
| | | | [+] |
| : | | | |
| | | | [-] |
----------------------------------------------------
*/
公共类AdjustableSlider扩展了JPanel{
//用于鼠标输入值的滑块
二等兵杰斯里德;
//用于手动输入值的文本框
私有JTextField val;
//制作一个右边有文本框的滑块,控制按钮向右移动1次,按钮堆叠。
公共可调整滑块(最小整数、最大整数、当前整数、间距整数){
setLayout(新边界布局(0,0));
me=新的JSlider();
me.setName(“”);
me.setMinimum(最小值);
me.setPaintLabels(true);
me.setPaintTicks(真);
me.setMajorTickSpacing(间距);
me.setmax(max);
me.setValue(cur);
我是你的听众(
新建javax.swing.event.ChangeListener(){
public void stateChanged(javax.swing.event.ChangeEvent e){
试一试{
如果(val.getText().length()是一个输入错误问题,那么问题是在实例化adjustersSub
之后,您重新定义了调整器的布局
49c49
< adjusters.setLayout(new BorderLayout(0, 0));
---
> adjustersSub.setLayout(new BorderLayout(0, 0));
49c49
AdjusterSub.setLayout(新边框布局(0,0));
这是一个打字错误问题,您的问题是在实例化adjustersSub
之后,您重新定义了调整器的布局
49c49
< adjusters.setLayout(new BorderLayout(0, 0));
---
> adjustersSub.setLayout(new BorderLayout(0, 0));
49c49
AdjusterSub.setLayout(新边框布局(0,0));
这是一个打字错误问题,您的问题是在实例化adjustersSub
之后,您重新定义了调整器的布局
49c49
< adjusters.setLayout(new BorderLayout(0, 0));
---
> adjustersSub.setLayout(new BorderLayout(0, 0));
49c49
AdjusterSub.setLayout(新边框布局(0,0));
这是一个打字错误问题,您的问题是在实例化adjustersSub
之后,您重新定义了调整器的布局
49c49
< adjusters.setLayout(new BorderLayout(0, 0));
---
> adjustersSub.setLayout(new BorderLayout(0, 0));
49c49
AdjusterSub.setLayout(新边框布局(0,0));
谢谢,我现在觉得很愚蠢…我会看看我再次上网时是否无法上传编辑…谢谢,我现在感觉很愚蠢…我会看看我再次上网时是否无法上传编辑…谢谢,我现在感觉很愚蠢…我会看看我再次上网时是否无法上传编辑…谢谢,我感觉很好pid现在…我会看看,如果我不能上传编辑,当我再次上网。。。