【发布时间】：2011-02-22 17:01:35
【问题描述】：
我仍在努力创建这款游戏：Choosing design method for ladder-like word game。我几乎可以使用它，但有一个问题。当我插入一个单词并且它是正确的时，整个窗口应该重新加载，并且包含字母的 JButtons 应该用不同的样式重新绘制。但不知何故，游戏面板的 repaint() 方法（在 Main 方法中）根本不会影响它。我究竟做错了什么 ？这是我的代码：
主要：
import java.util.Scanner;
import javax.swing.*;
import java.awt.*;
public class Main {
public static void main(String[] args){
final JFrame f = new JFrame("Ladder Game");
Scanner sc = new Scanner(System.in);
System.out.println("Creating game data...");
System.out.println("Height: ");
//setting height of the grid
while (!sc.hasNextInt()) {
System.out.println("int, please!");
sc.next();
}
final int height = sc.nextInt();
/*
* I'm creating Grid[]game. Each row of game contains Grid of Element[]line.
* Each row of line contains Elements, which are single letters in the game.
*/
Grid[]game = new Grid[height];
for(int L = 0; L < height; L++){
Grid row = null;
int i = L+1;
String s;
do {
System.out.println("Length "+i+", please!");
s = sc.next();
} while (s.length() != i);
Element[] line = new Element[s.length()];
Element single = null;
String[] temp = null;
String[] temp2 = new String[s.length()];
temp = s.split("");
for( int j = temp2.length; j>0; j--){
temp2[j-1] = temp[j];
}
for (int k = 0 ; k < temp2.length ; k++) {
if( k == 0 ){
single = new Element(temp2[k], 2);
}
else{
single = new Element(temp2[k], 1);
}
line[k] = single;
}
row = new Grid(line);
game[L] = row;
}
//############################################
//THE GAME STARTS HERE
//############################################
//create new game panel with box layout
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.setBackground(Color.ORANGE);
panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
//for each row of the game array add panel containing letters Single panel
//is drawn with Grid's paint() method and then returned here to be added
for(int i = 0; i < game.length; i++){
panel.add(game[i].paint());
}
f.setContentPane(panel);
f.pack();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
boolean end = false;
boolean word = false;
String text;
/*
* Game continues until solved() returns true. First check if given word matches the length,
* and then the value of any row. If yes - change state of each letter from EMPTY
* to OTHER_LETTER. Then repaint the window.
*/
while( !end ){
while( !word ){
text = JOptionPane.showInputDialog("Input word: ");
for(int i = 1; i< game.length; i++){
if(game[i].equalLength(text)){
if(game[i].equalValue(text)){
game[i].changeState(3);
f.repaint();
//simple debug - I'm checking if letter, and
//state values for each Element are proper
for(int k=0; k<=i; k++){
System.out.print(game[k].e[k].letter());
}
System.out.println();
for(int k=0; k<=i; k++){
System.out.print(game[k].e[k].getState());
}
System.out.println();
//set word to true and ask for another word
word = true;
}
}
}
}
word = false;
//check if the game has ended
for(int i = 0; i < game.length; i++){
if(game[i].solved()){
end = true;
}
else {
end = false;
}
}
}
}
}
元素：
import javax.swing.*;
import java.awt.*;
public class Element {
final int INVISIBLE = 0;
final int EMPTY = 1;
final int FIRST_LETTER = 2;
final int OTHER_LETTER = 3;
private int state;
private String letter;
public Element(){
}
//empty block
public Element(int state){
this("", 0);
}
//filled block
public Element(String s, int state){
this.state = state;
this.letter = s;
}
public JButton paint(){
JButton button = null;
if( state == EMPTY ){
button = new JButton(" ");
button.setBackground(Color.WHITE);
}
else if ( state == FIRST_LETTER ){
button = new JButton(letter);
button.setBackground(Color.red);
}
else {
button = new JButton(letter);
button.setBackground(Color.yellow);
}
return button;
}
public void changeState(int s){
state = s;
}
public void setLetter(String s){
letter = s;
}
public String letter(){
return letter;
}
public int getState(){
return state;
}
}
网格：
import javax.swing.*;
import java.awt.*;
public class Grid extends JPanel{
public Element[]e;
private Grid[]g;
public Grid(){}
public Grid( Element[]elements ){
e = new Element[elements.length];
for(int i=0; i< e.length; i++){
e[i] = elements[i];
}
}
public Grid(Grid[]grid){
g = new Grid[grid.length];
for(int i=0; i<g.length; i++){
g[i] = grid[i];
}
Dimension d = new Dimension(600, 600);
setMinimumSize(d);
setPreferredSize(new Dimension(d));
setMaximumSize(d);
}
//for Each element in line - change state to i
public void changeState(int i){
for(int j=0; j< e.length; j++){
e[j].changeState(3);
}
}
//create panel which will be single row of the game. Add elements to the panel.
// return JPanel to be added to grid.
public JPanel paint(){
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1, e.length));
panel.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
for(int j = 0; j < e.length; j++){
panel.add(e[j].paint());
}
return panel;
}
//check if the length of given string is equal to length of row
public boolean equalLength(String s){
int len = s.length();
boolean equal = false;
for(int j = 0; j < e.length; j++){
if(e.length == len){
equal = true;
}
}
return equal;
}
//check if the value of given string is equal to values of elements in row
public boolean equalValue(String s){
int len = s.length();
boolean equal = false;
String[] temp = null;
String[] temp2 = new String[len];
temp = s.split("");
for( int j = len; j>0; j--){
temp2[j-1] = temp[j];
}
for(int j = 0; j < e.length; j++){
if( e[j].letter().equals(temp2[j]) ){
equal = true;
}
else {
equal = false;
}
}
if(equal){
for(int i = 0; i < e.length; i++){
e[i].changeState(3);
}
}
return equal;
}
//check if the game has finished
public boolean solved(){
boolean solved = false;
for(int j = 0; j < e.length; j++){
if(e[j].getState() == 3){
solved = true;
}
else {
solved = false;
}
}
return solved;
}
}
【问题讨论】：
标签： java user-interface components