我正在制作一个词汇测验程序，当他们点击一个选项时，会弹出一个新窗口，说明他们是对还是错。这是有效的，但是没有显示的是窗口中的按钮，它可以让您选择返回测验，破坏继续下一个问题的机会，甚至更糟糕的是，回答当前问题。
以下是主要的测验代码：
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.DataFormatter;
public class SAT extends JFrame implements ActionListener{
private JButton buttonA;
private JButton buttonB;
private JButton buttonC;
private JButton buttonD;
private JPanel panel1;
private JFrame frame1;
private JTextField Text1;
private JLabel label1;
public static final String POOP = "Words3.xls"; //everywhere that there is POOP is the excel sheet
public static String read1(int rowIndex, int colIndex, int a)
{
String value = new String();
HSSFWorkbook wb = null;
try {
wb = new HSSFWorkbook(new FileInputStream(POOP));
} catch (Exception e) {
e.printStackTrace();
}
String sheet2=null;//placeholder
if (a==1){sheet2="SAT";}//one of these for each sheet
if (a==2){sheet2="Test";}
if (a==3){sheet2="vwlvlHU1";}
HSSFSheet sheet = wb.getSheet(sheet2);
HSSFRow row=sheet.getRow(rowIndex-1);
HSSFCell cell=row.getCell(colIndex-1);
DataFormatter formatter = new DataFormatter();
value = formatter.formatCellValue(cell);
return value;
}
private static void saveWorkbook(HSSFWorkbook wb) throws IOException
{
FileOutputStream out = new FileOutputStream(POOP);
wb.write(out);
out.close();
}
public static int RNG1(int a) { //this RNG is used to find the word and random definitions
//RNG code:
int min=1;//1
int max=100;//number of flash cards, highest number, this is a placeholder
if (a==1){max=253;}//we will have one of these statements for each set
if (a==2){max=20;}
if (a==3){max=40;}
Random rand = new Random();
int randomNum = rand.nextInt((max - min) + 1) + min + 1;//the +1 is so it doesn't choose header, maybe remove
return randomNum;
}
public static int RNG2(int b) {//this RNG will be used to determine which button gets true definition
//RNG code:
int min=1;//1
int max=4;//number of options
Random rand = new Random();
int randomNum = rand.nextInt((max - min) + 1) + min;
return randomNum;
}
//FIND THE WORD AND POS
int a=1;//tells methods to look in right set
int rowIndex=RNG1(a);//here is where a random word, pos, and def will be called for
int colIndex=1;//use colIndex=1 to show word
String WORD=read1(rowIndex,colIndex,a);//to pull word
//System.out.println("Word: "+WORD);
int colIndexPOS=2;//POS=part of speech/colIndexPOS=2 for part of speech
String POS=read1(rowIndex,colIndexPOS,a);
//System.out.println("Part of speech: "+POS);
int b=1;//placeholder
int location=RNG2(b);
//if location=1, put it in button 1 and have random definitions for other 3
//if location=2... same for 3 and 4
private String def(){
//TRUE DEFINITION:
int colIndexDEF=3;//DEF= definition/colIndexPOS=3 for definitions
String DEF=read1(rowIndex,colIndexDEF,a);
return DEF;
}
//FAKE DEFINITIONS:
//fake def 1:
private String rdef1(){//THIS BLOCK HAS AN ISSUE. SHOULD NOT BE DIVIDED BY CURLY BRACES BUT IT IS AN ERROR IF THEY ARE NOT THERE. MAYBE MAKE IT A METHOD?
int rowIndex1=0;//null value
int colIndexDEF=3;
String weirdo="WHY";
do{
rowIndex1=RNG1(a);
weirdo=read1(rowIndex1, colIndexPOS, a);
}while(rowIndex1==rowIndex || !weirdo.equals(POS));
String RANDDEF1=read1(rowIndex1, colIndexDEF, a);
return RANDDEF1;
}
//fake def 2:
private String rdef2(){//FIX DOWHILE
int rowIndex2=1;//null value
int colIndexDEF=3;
String POSsave1=null;
//do{
rowIndex2=RNG1(a);
POSsave1=read1(rowIndex2, colIndexPOS, a);
//}while(rowIndex2==rowIndex1 || rowIndex2==rowIndex || !POSsave1.equals(POS));
String RANDDEF2=read1(rowIndex2, colIndexDEF, a);
return RANDDEF2;
}
//fake def 3:
private String rdef3(){//FIX DOWHILE
int rowIndex3=1;//null value
int colIndexDEF=3;
String POSsave2=null;
//do{
rowIndex3=RNG1(a);
POSsave2=read1(rowIndex3, colIndexPOS, a);
//}while(rowIndex3==rowIndex || rowIndex3==rowIndex2 || rowIndex3==rowIndex1 || !POSsave2.equals(POS));
String RANDDEF3=read1(rowIndex3, colIndexDEF, a);
return RANDDEF3;
}
private void createButtonA() {
String definition=null;
if (location==1){
definition=def();
}
if (location==2){
definition=rdef1();
}
if (location==3){
definition=rdef2();
}
if (location==4){
definition=rdef3();
}
buttonA = new JButton(definition);
add(buttonA);
buttonA.setContentAreaFilled(false);
buttonA.addActionListener((ActionListener) this);//this allows an action to be performed when the button is pressed
buttonA.setForeground(Color.blue);
buttonA.setBounds(45,130,295,25);
}
private void createButtonB() {
String definitionB=null;
if (location==1){
definitionB=rdef1();
}
if (location==2){
definitionB=def();
}
if (location==3){
definitionB=rdef3();
}
if (location==4){
definitionB=rdef2();
}
buttonB = new JButton(definitionB);
add(buttonB);
buttonB.setContentAreaFilled(false);
buttonB.addActionListener((ActionListener) this);//this allows an action to be performed when the button is pressed
buttonB.setForeground(Color.blue);
buttonB.setBounds(45,95,295,25);
}
private void createButtonC() {
String definitionC=null;
if (location==1){
definitionC=rdef2();
}
if (location==2){
definitionC=rdef3();
}
if (location==3){
definitionC=def();
}
if (location==4){
definitionC=rdef1();
}
buttonC = new JButton(definitionC);
add(buttonC);
buttonC.setContentAreaFilled(false);
buttonC.addActionListener((ActionListener) this);//this allows an action to be performed when the button is pressed
buttonC.setForeground(Color.blue);
buttonC.setBounds(45,60,295,25);
}
private void createButtonD() {
String definitionD=null;
if (location==1){
definitionD=rdef3();
}
if (location==2){
definitionD=rdef2();
}
if (location==3){
definitionD=rdef1();
}
if (location==4){
definitionD=def();
}
buttonD = new JButton(definitionD);
add(buttonD);
buttonD.setContentAreaFilled(false);
buttonD.addActionListener((ActionListener) this);//this allows an action to be performed when the button is pressed
buttonD.setForeground(Color.blue);
buttonD.setBounds(45,25,295,25);
}
public static void main(String[] args) {
SAT frameTable = new SAT();
//frameTable.SAT(); //Creating Frame
frameTable.createButtonA(); //Creating Button 1
frameTable.createButtonB(); //Creating Button 2
frameTable.createButtonC();//Creating button 3
frameTable.createButtonD();//Creating button 3
}
public SAT() {//problem
Container window = getContentPane();
window.setLayout(new FlowLayout() ); //using the FlowLayout manager
setSize(400,250); //setting the size of the initial box
setVisible(true); //allows for manual size changing of the box
setTitle("FlaQuiZ"); //Title for the GUI
window.setBackground(Color.white);
setLocation(500,280);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Allows us to actually exit when we click the "X"
panel1 = new JPanel(new GridLayout());
add(new JLabel("Choose the option that best fits this word: "+WORD));
//add(new JLabel(""));
}
public void actionPerformed(ActionEvent i) {
if ( location==1 && i.getSource() == buttonA || location==2 && i.getSource()==buttonB || location==3 && i.getSource()==buttonC || location==4 && i.getSource()==buttonD) {
GRATS congrats =new GRATS();
congrats.setVisible(true);
dispose();
}
else{
NO bad =new NO();
bad.setVisible(true);
dispose();
}
}
}
如果他们弄错了，那么这里的代码就是代码，按钮应该显示为可以选择返回：
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class NO extends JFrame implements ActionListener{
private JButton NOB;
private JPanel panel3;
public NO() {
Container window = getContentPane();
window.setLayout(new FlowLayout() ); //using the FlowLayout manager
setSize(275,160); //setting the size of the initial box
setVisible(true); //allows for manual size changing of the box
setTitle("Flaquiz"); //Title for the GUI
window.setBackground(Color.white);
setLocation(500,280);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Allows us to actually exit when we click the "X"
JPanel panel3 = new JPanel(new GridLayout());
add(new JLabel("Uh oh, you got it wrong!"));
//add(new JLabel(""));
}
public static void main(String[] args) {
NO bad = new NO();
//frameTable.SAT(); //Creating Frame
bad.createbuttonNOB(); //Creating Button 1
}
private void createbuttonNOB() {
NOB = new JButton("Go Back");
add(NOB);
NOB.setContentAreaFilled(false);
NOB.addActionListener((ActionListener) this);//this allows an action to be performed when the button is pressed
NOB.setForeground(Color.blue);
NOB.setBounds(45,45,45,45);
}
public void actionPerformed(ActionEvent i) {
if (i.getSource() == NOB ) {
SAT goback =new SAT();
goback.setVisible(true);
dispose();
}
}
}
答案 0 :(得分：0)
我可能会遗漏某些内容，但即使你有一个占用整个框架的JPanel，它似乎也会直接将按钮添加到JFrame中。为什么不将按钮添加到JPanel？
旁注：在NO构造函数中，SetVisible不会确定您是否可以手动更改大小。这是由SetMaximumSize，SetMinimumSize和SetResizable之类的东西控制的。