我编写了一个程序，其中在数组中包含一些同类的 JPanel。 不管怎样，这一切都很好。
我的问题是它们的图像绘制得非常好。 但它并没有停止这样做，就好像它在循环中一样？
这是代码:
package Try1;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import java.util.Stack;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
// slot is a defined place on the backgammon board that can hold
// one type of pieces black or white.
//there are 24 slots 12 on each side and 6 in each quartor.
//if a slot holds 2 or more pieces those pieces cannot be eaten.
public class Slot extends JPanel{
private int ap=0;
private int slotNumber;
private int piecesAmount;
private SlotType type;
private Stack<WhitePiece> wPieces;
private Stack<BlackPiece> bPieces;
private Image wPieceImage;
private Image bPieceImage;
public Slot() throws IOException{
setLayout(null);
setOpaque(false);
//setBackground(new Color(0,0,0,0));
type = SlotType.empty;
piecesAmount = 0;
setSize(300,40);
wPieces = new Stack<WhitePiece>();
bPieces = new Stack<BlackPiece>();
wPieceImage = ImageIO.read(new File("pics/whitePiece.png"));
bPieceImage = ImageIO.read(new File("pics/blackPiece.png"));
}
public Slot(int pA, int sN, SlotType t) throws IOException{
setLayout(null);
setOpaque(false);
if(t != SlotType.empty){
piecesAmount = pA;
slotNumber = sN;
type = t;
wPieces = new Stack<WhitePiece>();
bPieces = new Stack<BlackPiece>();
wPieceImage = ImageIO.read(new File("pics/whitePiece.png"));
bPieceImage = ImageIO.read(new File("pics/blackPiece.png"));
if(t == SlotType.black){
for(int i=0;i<pA;i++)
bPieces.push(new BlackPiece());
}else{
for(int i=0;i<pA;i++)
wPieces.push(new WhitePiece());
}
}
}
public void paintComponent(Graphics g){
ap++;
System.out.println(ap);
super.paintComponent(g);
if(type == SlotType.empty){
System.out.println("no type selected slot is empty Slot Number"+slotNumber);
}else
if(type == SlotType.white){
if(!wPieces.isEmpty()){
if(slotNumber <= 12){
for(int i=0;i<piecesAmount;i++){
g.drawImage( wPieceImage, 5, i*30, null);
}
}
else{
for(int i=0;i<piecesAmount;i++){
g.drawImage(wPieceImage, 5,220-(i*30), null);
}
}
System.out.println("Slot #"+slotNumber+" was drawed");
}else{
System.out.println("Slot Stack is Empty Slot #"+slotNumber);
}
}else
{
if(!bPieces.isEmpty()){
if(slotNumber<=12){
for(int i=0;i<piecesAmount;i++){
g.drawImage(bPieceImage, 5, i*30, 30, 30, null);
}
}else{
for(int i=0;i<piecesAmount;i++){
g.drawImage(bPieceImage, 5, 220-(i*30), 30, 30, null);
}
}
}
else{
System.out.println("Slot Stack is empty Slot #"+slotNumber);
}
}
}
public SlotType getType(){
return type;
}
public void setType(SlotType t){
if(piecesAmount == 0)
type = t;
}
public int getPiecesAmount(){
return piecesAmount;
}
public void setPiecesAmount(int pa) throws IOException{
if(type != SlotType.empty){
piecesAmount = pa;
if(type == SlotType.black){
if(pa>bPieces.size())
for(int i=0;i<(pa-bPieces.size());i++)
bPieces.push(new BlackPiece());
else
if(pa<bPieces.size())
for(int i=0;i<(bPieces.size()-pa);i++)
bPieces.pop();
}
else{
if(pa>wPieces.size())
for(int i=0;i<(pa-wPieces.size());i++)
wPieces.push(new WhitePiece());
else
if(pa<wPieces.size())
for(int i=0;i<(wPieces.size()-pa);i++)
wPieces.pop();
}
}else{
System.out.println("Slot #"+slotNumber+" is Empty Slot");
}
}
public void decreasePiecesAmount(){
if(type != SlotType.empty){
piecesAmount --;
if(type == SlotType.black)
bPieces.pop();
else
wPieces.pop();
}
}
public void increasePiecesAmount() throws IOException{
if(type != SlotType.empty){
piecesAmount ++;
if(type == SlotType.black)
bPieces.push(new BlackPiece());
else
wPieces.push(new WhitePiece());
}
}
public void pushPiece(){
}
protected void setSlotNumber(int sN){
slotNumber = sN;
}
public int getSlotNumber(){
return slotNumber;
}
public String toString(){
return "Slot #"+slotNumber+"\nSlot Type is: "+type.toString()+"\nAmount of pieces is: "+piecesAmount;
}
}
这是包含该类的类的代码:
package Try1;
import java.awt.Graphics;
import java.awt.Image;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Board extends JPanel {
private int drawedAmount = 0;
private Slot[][] board;
private Image image;
private Image wpieceImage;
private Image bpieceImage;
public Board() throws IOException{
setLayout(null);
board = new Slot[2][12];
image = ImageIO.read(new File("pics/board.png"));
wpieceImage = ImageIO.read(new File("pics/whitePiece.png"));
bpieceImage = ImageIO.read(new File("pics/blackPiece.png"));
JLabel ap = new JLabel(String.valueOf(drawedAmount));
ap.setBounds(210,10,30,40);
add(ap);
}
public void paintComponent(Graphics page)
{
super.paintComponent(page);
page.drawImage(image, 0, 0, null);
try {
drawBoard(page,board);
drawedAmount++;
} catch (IOException e) {
e.printStackTrace();
}
/*
//first 2
page.drawImage(bpieceImage, 123, 20, null);
page.drawImage(bpieceImage, 123, 50, null);
//5 blacks
page.drawImage(wpieceImage, 350, 20, null);
page.drawImage(wpieceImage, 350, 50, null);
page.drawImage(wpieceImage, 350, 80, null);
page.drawImage(wpieceImage, 350, 110, null);
page.drawImage(wpieceImage, 350, 140, null);
// 3 whites
page.drawImage(wpieceImage, 472, 20, null);
page.drawImage(wpieceImage, 472, 50, null);
page.drawImage(wpieceImage, 472, 80, null);
//5 blacks
page.drawImage(bpieceImage, 650, 20, null);
page.drawImage(bpieceImage, 650, 50, null);
page.drawImage(bpieceImage, 650, 80, null);
page.drawImage(bpieceImage, 650, 110, null);
page.drawImage(bpieceImage, 650, 140, null);
//2 whites
page.drawImage(wpieceImage, 124, 577, null);
page.drawImage(wpieceImage, 124, 547, null);
//5 blacks
page.drawImage(bpieceImage, 348, 577, null);
page.drawImage(bpieceImage, 348, 547, null);
page.drawImage(bpieceImage, 348, 517, null);
page.drawImage(bpieceImage, 348, 487, null);
page.drawImage(bpieceImage, 348, 457, null);
//3 blacks
page.drawImage(bpieceImage, 470, 577, null);
page.drawImage(bpieceImage, 470, 547, null);
page.drawImage(bpieceImage, 470, 517, null);
//5 whites
page.drawImage(wpieceImage, 650, 577, null);
page.drawImage(wpieceImage, 650, 547, null);
page.drawImage(wpieceImage, 650, 517, null);
page.drawImage(wpieceImage, 650, 487, null);
page.drawImage(wpieceImage, 650, 457, null); */
}
//resets board to the start of backgammon.
public void resetBoard() throws IOException{
//setting slot numbers.
for(int i=0;i<2;i++)
for(int j=0;j<12;j++){
if(i==0){
board[i][j] = new Slot();
board[i][j].setSlotNumber(j+1);
}
else{
board[i][j] = new Slot();
board[i][j].setSlotNumber(23-j+1);
}
}
// #1
board[0][0].setType(SlotType.black);
board[0][0].setPiecesAmount(2);
System.out.println(board[0][0].toString());
// #6
board[0][5].setType(SlotType.white);
board[0][5].setPiecesAmount(5);
System.out.println(board[0][5].toString());
// #8
board[0][7].setType(SlotType.white);
board[0][7].setPiecesAmount(3);
System.out.println(board[0][7].toString());
// #12
board[0][11].setType(SlotType.black);
board[0][11].setPiecesAmount(5);
System.out.println(board[0][11].toString());
// #13
board[1][11].setType(SlotType.white);
board[1][11].setPiecesAmount(5);
System.out.println(board[1][11].toString());
// # 17
board[1][7].setType(SlotType.black);
board[1][7].setPiecesAmount(3);
System.out.println(board[1][7].toString());
// #19
board[1][5].setType(SlotType.black);
board[1][5].setPiecesAmount(5);
System.out.println(board[1][5].toString());
// #24
board[1][0].setType(SlotType.white);
board[1][0].setPiecesAmount(2);
System.out.println(board[1][0].toString());
//setting bounds for all slots.
for(int i=0;i<2;i++)
for(int j=0;j<12;j++)
if(i==0){
if(j<=6){
board[i][j].setBounds((j*45)+118,20,40,250);
add(board[i][j]);
}
else{
board[i][j].setBounds(((j-7)*56)+422,20,40,250);
add(board[i][j]);
}
}
else{
if(j<=6){
board[i][j].setBounds((j*45)+118,360,40,250);
add(board[i][j]);
}
else{
board[i][j].setBounds(((j-7)*56)+422,360,40,250);
add(board[i][j]);
}
}
}
public void drawBoard(Graphics g,Slot[][] board) throws IOException{
for(int i=0;i<2;i++){
for(int j=0;j<12;j++){
board[i][j].repaint();
}
}
}
public void movePiece(int fslotNumber,int lslotNumber) throws IOException{
//find the slot in which piece is loacted.
int []firstSlotPosition= new int[2];
int dobreak=1;
for(int i=0;i<2;i++){
for(int j=0;j<12;j++){
if(board[i][j].getSlotNumber()==fslotNumber){
firstSlotPosition[0]=i;
firstSlotPosition[1]=j;
dobreak=0;
break;
}
}
if(dobreak==0)
break;
}
//find the slot that piece should move to.
int []finalSlotPosition= new int[2];
int dobreak2=1;
for(int i=0;i<2;i++){
for(int j=0;j<12;j++){
if(board[i][j].getSlotNumber()==lslotNumber){
finalSlotPosition[0]=i;
finalSlotPosition[1]=j;
dobreak2=0;
break;
}
}
if(dobreak2==0)
break;
}
// make move
// if the place where we want to move is empty set type
// and if its taken by another color dont make move.
boolean makeMove = true;
if(board[finalSlotPosition[0]][finalSlotPosition[1]].getType()==SlotType.empty){
board[finalSlotPosition[0]][finalSlotPosition[1]].setType(board[firstSlotPosition[0]][firstSlotPosition[1]].getType());
}else
if(board[finalSlotPosition[0]][finalSlotPosition[1]].getType()!=board[firstSlotPosition[0]][firstSlotPosition[1]].getType()){
System.out.println("move canceled!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
makeMove = false;
}
if(makeMove==true){
board[firstSlotPosition[0]][firstSlotPosition[1]].decreasePiecesAmount();
board[finalSlotPosition[0]][finalSlotPosition[1]].increasePiecesAmount();
}
}
}
最佳答案
这就是问题:
public void drawBoard(Graphics g,Slot[][] board) throws IOException{
for(int i=0;i<2;i++){
for(int j=0;j<12;j++){
board[i][j].repaint();
}
}
}
您从 paintComponent() 调用 drawBoard()。 repaint() 并没有像你想象的那样做。它请求重新绘制组件。这最终将导致 paintComponent() 调用。这具有无限重画的效果。
由于它们是游戏板上的 JComponent，因此在绘制游戏板时，swing 将自动调用它们各自的 paintComponent() 方法。您根本不需要 drawBoard()。
关于java - JPanel不断地用paintComponent绘制自己，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17911528/