（不是这样）这里的简短问题。我正在使用 Swing 作为 UI 而不是控制台（这使得在 Eclipse 中更容易使用，等等），但我似乎遇到了障碍。
我遇到的问题是，当我进入游戏循环时，UI 将无法正常显示。我得到了一个丑陋的窗框，它在整个过程中给了我“纸牌”的效果，并且在运行时它的 RAM 使用量迅速增长。
我在这里错过了关于 Swing 的一些重要内容吗？我必须使用 Swing 的并发设置来执行此操作吗？如果是这样，最好的方法是什么？
完整代码如下：
package roguelike;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.LinkedList;
import javax.swing.*;
import javax.swing.text.*;
public class roguelike {
Color c_black = new Color(0x000000);
Color c_white = new Color(0xffffff);
Color c_red = new Color(0xff0000);
Color c_blue = new Color(0x0000ff);
Color c_green = new Color(0x00ff00);
UI ui = null;
Player me = null;
Map gamemap = null;
LinkedList<Character> keyqueue = new LinkedList<Character>();
int charheight = 20;
int charwidth = 80;
public static void main(String[] args){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
roguelike game = new roguelike();
game.run();
}
});
}
public roguelike(){
gamemap = new Map();
ui = new UI(charheight,charwidth,"Monospaced");
me = new Player();
}
private class UI extends JFrame implements KeyListener{
private static final long serialVersionUID = 9065411532125953842L;
JPanel disp_screen = null;
JTextPane disp_screen_text = null;
StyledDocument disp_doc = null;
Font mono_norm = null;
int pxheight = 0;
int pxwidth = 0;
String[][] ctemp = new String[charheight][charwidth];
String[][] stemp = new String[charheight][charwidth];
public UI(int h,int w,String fontname){
setVisible(true);
charheight = h;
charwidth = w;
addKeyListener(this);
this.setResizable(false);
mono_norm = new Font(fontname,0,25);
initScreen(h,w);
add(disp_screen);
makeStyles();
try {
disp_doc.insertString(0, "12345678901234567890123456789012345678901234567890123456789012345678901234567890\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20", disp_doc.getStyle("Default"));
} catch (BadLocationException e) {
e.printStackTrace();
}
Dimension temp = disp_screen.getSize();
this.setSize(temp);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
try {
disp_doc.remove(0, disp_doc.getLength());
} catch (BadLocationException e) {
e.printStackTrace();
}
renderMap(gamemap.getText(),gamemap.getStyles());
}
@Override
public void keyPressed(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent e) {
keyqueue.add(e.getKeyChar());
}
private void initScreen(int height, int width){
FontMetrics metric = getFontMetrics(mono_norm);
String temp = null;
//generate a string of the right width from which to grab metrics
for(int x=0;x<=width;x++){
temp += '.';
}
pxwidth = SwingUtilities.computeStringWidth(metric, temp);
pxheight = (metric.getHeight())*charheight;
disp_screen = new JPanel();
disp_screen_text = new JTextPane();
disp_screen_text.setEditable(false);
disp_screen_text.setAlignmentX(LEFT_ALIGNMENT);
disp_screen_text.setAlignmentY(TOP_ALIGNMENT);
disp_screen_text.setFont(mono_norm);
disp_screen_text.setBackground(c_black);
disp_screen_text.setForeground(c_green);
disp_doc = disp_screen_text.getStyledDocument();
disp_screen.add(disp_screen_text);
disp_screen.setAlignmentX(LEFT_ALIGNMENT);
disp_screen.setAlignmentY(TOP_ALIGNMENT);
disp_screen.setLayout(new BoxLayout(disp_screen,BoxLayout.Y_AXIS));
}
private void makeStyles(){
//The default style removes all special formatting and returns the text to standard nonsense
Style sty_default = disp_doc.addStyle("Default", null);
StyleConstants.setFontFamily(sty_default, "Monospaced");
StyleConstants.setFontSize(sty_default, 18);
StyleConstants.setForeground(sty_default, c_green);
StyleConstants.setBackground(sty_default, c_black);
StyleConstants.setItalic(sty_default, false);
StyleConstants.setBold(sty_default, false);
//StyleConstants.setSpaceAbove(sty_default, 0);
//StyleConstants.setSpaceBelow(sty_default, 0);
//The following styles apply certain effects. They are meant to be set without replacing styles
Style sty_bold = disp_doc.addStyle("Bold", disp_doc.getStyle("Default"));
StyleConstants.setBold(sty_bold,true);
Style sty_ital = disp_doc.addStyle("Italic", disp_doc.getStyle("Default"));
StyleConstants.setItalic(sty_ital, true);
}
private void clearMap(){
try {
disp_doc.remove(0, disp_doc.getLength());
} catch (BadLocationException e1) {
e1.printStackTrace();
}
try {
//CLEAR THE MAP
//For every row...
for(int y=0;y<charheight;y++){
//For every column location in a row...
for(int x=0;x<charwidth;x++){
disp_doc.insertString(disp_doc.getLength(),".", disp_doc.getStyle("Default"));
}
disp_doc.insertString(disp_doc.getLength(),"\n", disp_doc.getStyle("Default"));
}
} catch (BadLocationException e){
e.printStackTrace();
}
}
public void renderMap(String[][] chars, String[][] styles){
System.out.print("Rendering map...");
clearMap();
ctemp = chars;
stemp = styles;
try {
//For every row...
for(int y=0;y<charheight;y++){
//For every column location in a row...
for(int x=0;x<charwidth;x++){
if(ctemp[y][x] != null){
if(stemp[y][x] == "D"){
disp_doc.remove((y*charwidth)+x, 1);
disp_doc.insertString((y*charwidth)+x,ctemp[y][x], disp_doc.getStyle("Default"));
} else if(stemp[y][x] == "B"){
disp_doc.remove((y*charwidth)+x, 1);
disp_doc.insertString((y*charwidth)+x,ctemp[y][x], disp_doc.getStyle("Bold"));
} else if(stemp[y][x] == "I"){
disp_doc.remove((y*charwidth)+x, 1);
disp_doc.insertString((y*charwidth)+x,ctemp[y][x], disp_doc.getStyle("Italic"));
} else{
disp_doc.remove((y*charwidth)+x, 1);
disp_doc.insertString((y*charwidth)+x,ctemp[y][x], disp_doc.getStyle("Default"));
}
}
}
}
} catch (BadLocationException e){
e.printStackTrace();
System.err.print(e.getCause());
}
}
}
//Handles the virtualized information of characters on the map. Does NOT handle display of map on screen
//Displaying the screen happens by passing required data to the ui member
private class Map{
//Holds an array of map characters
String[][] text = new String[charheight][charwidth];
//Holds an array of styles associated with each map character
String[][] styles = new String[charheight][charwidth];
public Map(){
}
public String[][] getText(){
return text;
}
public String[][] getStyles(){
return styles;
}
public void putch(String thing, String styledef,int y, int x){
text[y][x] = thing;
styles[y][x] = styledef;
}
}
private class Player{
//Player location, [y][x]
int[] location = {0,0};
String sym = "@";
public Player(){
}
public int[] getLocation(){
return location;
}
public String getSymbol(){
return sym;
}
public void setLocation(int y, int x){
location[0]=y;
location[1]=x;
}
public void setSymbol(String newsym){
sym = newsym;
}
public void move(int dir){
//Movement will be handled in an 8 directional fashion
//North is 1, like below
// 812
// 703
// 654
//////////////////////
switch(dir){
case 0:
break;
case 1:
location[0] += 1;
break;
case 2:
location[0] += 1;
location[1] += 1;
break;
case 3:
location[1] += 1;
break;
case 4:
location[0] -= 1;
location[1] += 1;
break;
case 5:
location[0] -= 1;
break;
case 6:
location[0] -= 1;
location[1] -= 1;
break;
case 7:
location[1] -= 1;
break;
case 8:
location[0] += 1;
location[1] -= 1;
default:
System.err.print("ERROR! "+dir+" is not a valid direction!");
break;
}
}
}
/////////////////////////////////////////////////////
/////////////FUNCTIONS///////////////////////////////
/////////////////////////////////////////////////////
public void run(){
boolean running = true;
while(running){
//Render Map
gamemap.putch(me.getSymbol(), "D", me.getLocation()[0], me.getLocation()[1]);
ui.renderMap(gamemap.getText(), gamemap.getStyles());
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
//Wait for player input
if(keyqueue.isEmpty()){
continue;
}
//Act on input
else{
char input = keyqueue.getFirst();
keyqueue.removeFirst();
if(input == 'w'){
me.move(1);
}
if(input =='a'){
me.move(7);
}
if(input == 's'){
me.move(5);
}
if(input == 'd'){
me.move(3);
}
}
}
}
}