Java 为什么我的绘制方法中没有更新我的字符串?
我试图在我的网格系统中改变位置(0,1)处的文本,但由于某种原因,它之前的数字保持不变,所以如果我将它从0改为1,它是一个0,1重叠。我的代码出了什么问题导致了这种情况 主要类别:Java 为什么我的绘制方法中没有更新我的字符串?,java,swing,awt,Java,Swing,Awt,我试图在我的网格系统中改变位置(0,1)处的文本,但由于某种原因,它之前的数字保持不变,所以如果我将它从0改为1,它是一个0,1重叠。我的代码出了什么问题导致了这种情况 主要类别: package Tetris; import java.awt.Color; import javax.swing.JFrame; class Tetris { JFrame frame; public Tetris() { frame = new JFrame("Tetris
package Tetris;
import java.awt.Color;
import javax.swing.JFrame;
class Tetris {
JFrame frame;
public Tetris() {
frame = new JFrame("Tetris");
frame.setSize(500, 500);
frame.setVisible(true);
frame.setResizable(false);
//frame.setLocationRelativeTo(null);
frame.getContentPane().setBackground(Color.LIGHT_GRAY);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new Board(frame));
}
public static void main(String[] args) {
new Tetris();
}
}
游戏类别:
package Tetris;
import java.awt.Graphics;
import java.awt.event.*;
import javax.swing.*;
public class Board extends JPanel {
private static final long serialVersionUID = -5635526290001171288L;
private int[][] boardLayout;
private int[] piecePos;
private float timerCount = 0.0f;
private String boardLayoutString;
private Timer timer;
public Board(JFrame frame) {
timer = new Timer(10, new ActionListener() {
public void actionPerformed(ActionEvent e) {
update();
}
});
timer.start();
boardLayout = new int[8][16];
piecePos = new int[] { 1, 0 };
boardLayoutString = "";
for(int y = 0; y < 16; y++) { // grid system
for(int x = 0; x < 8; x++) {
boardLayout[x][y] = 0;
if(x == 7) {
boardLayoutString += boardLayout[x][y] + "\n";
} else {
boardLayoutString += boardLayout[x][y] + " ";
}
}
}
frame.addKeyListener(new KeyListener() { // maybe put this somewhere else
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_ESCAPE) {
System.exit(0);
}
if(e.getKeyCode() == KeyEvent.VK_Q) {
boardLayout[1][0] = 2;
}
}
public void keyReleased(KeyEvent e) {
//
}
public void keyTyped(KeyEvent e) {
//
}
});
}
private String boardLayoutToString(int[][] boardLayout) {
boardLayoutString = "";
for(int y = 0; y < 16; y++) { // grid system
for(int x = 0; x < 8; x++) {
if(x == 7) {
boardLayoutString += boardLayout[x][y] + "\n";
} else {
boardLayoutString += boardLayout[x][y] + " ";
}
}
}
return boardLayoutString;
}
private void update() {
timerCount += 0.01f; // every 10ms, add 0.01 - this means 1.0f = 1s
if(timerCount >= 1.0f) { // do something every 1s
// if(piecePos[1] < 8) {
// boardLayout[piecePos[0]][piecePos[1]] = 1;
// piecePos[1]++;
// if(piecePos[1] > 0) {
// boardLayout[piecePos[0]][piecePos[1] - 1] = 0;
// }
// } else {
// piecePos = new int[] { 1, 0 };
// }
timerCount = 0.0f;
}
}
public void paint(Graphics g) {
//Graphics2D g2 = (Graphics2D) g;
for(int i = 0; i < boardLayoutToString(boardLayout).split("\n").length; i++) {
g.drawString(boardLayoutToString(boardLayout).split("\n")[i], 50, 50 + (i * 15));
}
repaint();
}
}
package俄罗斯方块;
导入java.awt.Graphics;
导入java.awt.event.*;
导入javax.swing.*;
公共课程委员会扩展JPanel{
私有静态最终长serialVersionUID=-56355262900011788L;
专用int[][]板布局;
私人机构;
专用浮动时间计数=0.0f;
私有字符串boardLayoutString;
私人定时器;
公共板(JFrame){
计时器=新计时器(10,新ActionListener(){
已执行的公共无效操作(操作事件e){
更新();
}
});
timer.start();
boardLayout=新国际[8][16];
piecePos=新的int[]{1,0};
boardLayoutString=“”;
对于(int y=0;y<16;y++){//网格系统
对于(int x=0;x<8;x++){
boardLayout[x][y]=0;
如果(x==7){
boardLayoutString+=boardLayout[x][y]+“\n”;
}否则{
boardLayoutString+=boardLayout[x][y]+'';
}
}
}
frame.addKeyListener(newKeyListener(){//可能将其放在其他地方
按下公共无效键(按键事件e){
if(例如getKeyCode()==KeyEvent.VK_ESCAPE){
系统出口(0);
}
如果(例如getKeyCode()==KeyEvent.VK_Q){
boardLayout[1][0]=2;
}
}
公共无效密钥已释放(密钥事件e){
//
}
public void keyTyped(KeyEvent e){
//
}
});
}
专用字符串boardLayoutToString(int[][]boardLayout){
boardLayoutString=“”;
对于(int y=0;y<16;y++){//网格系统
对于(int x=0;x<8;x++){
如果(x==7){
boardLayoutString+=boardLayout[x][y]+“\n”;
}否则{
boardLayoutString+=boardLayout[x][y]+'';
}
}
}
返回boardLayoutString;
}
私有void更新(){
timerCount+=0.01f;//每10毫秒加0.01-表示1.0f=1s
如果(timerCount>=1.0f){//每1s做一次
//如果(工件位置[1]<8){
//板布局[piecePos[0]][piecePos[1]]=1;
//piecePos[1]++;
//如果(分段位置[1]>0){
//板布局[piecePos[0]][piecePos[1]-1]=0;
// }
//}其他{
//piecePos=新的int[]{1,0};
// }
时间计数=0.0f;
}
}
公共空间涂料(图g){
//图形2d g2=(图形2d)g;
对于(int i=0;i
该源代码有一些可疑的功能
JComponent
中的自定义绘制,请使用paintComponent(Graphics)
而不是paint(Graphics)
super.paintComponent(Graphics)
清除上一张图纸。@Override
符号以确保编译时检查repaint()
,而是从由Swing计时器控制的ActionListener
调用它
谢谢,这很有效。:)我现在唯一的问题是背景色不起作用——大概是因为
super.paintComponent(g)代码>正在它上面绘制。我如何在没有画的情况下制作纯色背景色?确保你的组件是不透明的。我解决了背景色问题,别担心。你的回答很有帮助,谢谢。