我有一个标签需要在程序运行时使用其中的两个方法之一进行更新,因此我在方法中添加了组件,我无法显示它们中的任何一个。据我所知,因为它们在构造函数之外,我曾经在方法中声明它们,但是移动它来尝试修复问题。任何帮助将不胜感激。
我道歉它有点乱,我一直试图解决这个问题,有点盲目。
此外,代码编译良好,并且代码中的println输出按预期显示。
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package assgui;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import java.io.*;
/**
*
* @author Hugh
*/
public class ResultPanel extends JPanel {
static String[][] activityString = new String[31][2];
static String[][] foodString = new String[36][2];
String weighstr, foodstr, servstr, kjstr, actstr, hourstr, minstr, metstr;
JLabel uw = new JLabel ("User Weight: ");
JLabel weigh = new JLabel (weighstr);
JLabel kg = new JLabel(" kg");
JLabel sel1 = new JLabel("Food: ");
JLabel sel2 = new JLabel(foodstr);
JLabel sel3 = new JLabel(" - kj ");
JLabel sel4 = new JLabel(kjstr);
JLabel sel5 = new JLabel(" , Servings: ");
JLabel sel6 = new JLabel(servstr);
JLabel sel7 = new JLabel("Activity for comparison: ");
JLabel sel8 = new JLabel(actstr);
JLabel sel9 = new JLabel(" Time required to balance: ");
JLabel sel10 = new JLabel(hourstr);
JLabel sel11 = new JLabel(" hours");
JLabel sel12 = new JLabel(minstr);
JLabel sel13 = new JLabel(" minutes");
JLabel smlspace = new JLabel(" ");
JLabel medspace = new JLabel(" ");
JLabel lrgspace = new JLabel(" ");
JLabel auw = new JLabel("User Weight: ");
JLabel aweigh = new JLabel(weighstr);
JLabel akg = new JLabel(" kg");
JLabel asel1 = new JLabel("Activity: ");
JLabel asel2 = new JLabel(actstr);
JLabel asel3 = new JLabel(" - MET ");
JLabel asel4 = new JLabel(metstr);
JLabel asel5 = new JLabel(" , Duration: ");
JLabel asel6 = new JLabel(hourstr);
JLabel asel7 = new JLabel(" hour ");
JLabel asel8 = new JLabel(minstr);
JLabel asel9 = new JLabel(" minutes ");
JLabel asel10 = new JLabel("Food for comparison: ");
JLabel asel11 = new JLabel(foodstr);
JLabel asel12 = new JLabel(" Servings to balance: ");
JLabel asel13 = new JLabel(servstr);
JLabel asmlspace = new JLabel(" ");
JLabel amedspace = new JLabel(" ");
JLabel alrgspace = new JLabel(" ");
Public ResultPanel() {
setBackground(Color.GREEN);
setPreferredSize(new Dimension(650, 600));
{
public void activityPaint (String[][] actstring, String[][] foodstring, double weight, int activity, int hour, int min, int food, double servings) {
System.out.println("act1");
weighstr = Double.toString(weight);
actstr = activityString[activity][0];
hourstr = Integer.toString(hour);
minstr = Integer.toString(min);
metstr = activityString[activity][1];
foodstr = foodString[food][0];
servstr = Double.toString(servings);
add(lrgspace);
add(uw);
add(weigh);
add(kg);
add(medspace);
add(sel1);
add(sel2);
add(sel3);
add(sel4);
add(sel5);
add(sel6);
add(sel7);
add(sel8);
add(sel9);
add(sel10);
add(sel11);
add(sel12);
add(sel13);
}
public void foodPaint(String[][] foodstring, String[][] actstring, double weight, int food, int servings, int activity, int hour, int min) {
System.out.println("food1");
weighstr = Double.toString(weight);
foodstr = foodString[food][0];
servstr = Integer.toString(servings);
kjstr = foodString[food][1];
actstr = activityString[activity][0];
hourstr = Integer.toString(hour);
minstr = Integer.toString(min);
add(lrgspace);
add(uw);
add(weigh);
add(kg);
add(medspace);
add(sel1);
add(sel2);
add(sel3);
add(sel4);
add(sel5);
add(sel6);
add(sel7);
add(sel8);
add(sel9);
add(sel10);
add(sel11);
add(sel12);
add(sel13);
}
}
答案 0 :(得分:1)
创建此JPanel的主方法(或任何方法)是否也调用activityPaint(...)和foodPaint(...)方法?如果没有调用这些方法,那么它们似乎永远不会被添加到面板中。如果你想在创建JPanel时添加所有内容,那么你必须让你的构造函数调用activityPaint()和foodPaint()。
如果在发生其他事情之前无法设置JLable的值(如用户输入),则可以在创建JPanel时添加组件,然后再调用setText(...)方法。只要确定你是否这样做也设置了大小,因为更改文本会影响它。我更喜欢使用 nameofjpanel .setSize( nameofjpanel .getPreferredSize())。
希望这有助于你,我并没有完全错过你在这里的目标。