我的项目要求我创建一个保存按钮，按下该按钮时，会将图像名称（贴纸）及其坐标写入save.txt。它写入save.txt但只会写入最新的图像。我明白为什么会这样做而不是如何解决它。这样做是因为每次放置图像时，它都会增加整数“图像”。当我按下保存时，它会写出“图像”的名称和坐标。所以它会写出最新的一个。请帮我把它从头开始写。这是我代码的保存部分。
else if (savePicture.isPointInElement(clickX, clickY)){
FileWriter fw = new FileWriter("save.txt");
for (int i = 0; i < image; i++){
if (arraysticker[image] != null){
String name;
int x,y;
name = sticker.getname();
x = sticker.getx();
y = sticker.gety();
fw.write(name + " " + x + " " + y + "\n");
}
}
fw.flush();
fw.close();
System.out.println("saved");
}
如果您需要，这是我的完整代码。唯一缺少的是我放置初始图像。
sticker arrayhat = new sticker (20, "hat.png");
sticker arrayblunt = new sticker (20, "blunt.png");
sticker arraydealwithit = new sticker (20, "dealwithit.png");
sticker arrayweed = new sticker (20, "weed.png");
int image = -1;//declares an integer variable named image
//creates a boolean variable and sets it to false
boolean hatSoundPlay = false;
boolean bluntSoundPlay = false;
boolean dealwithitSoundPlay = false;
boolean weedSoundPlay = false;
while (true){//while it is true
if (EZInteraction.wasMouseLeftButtonReleased()){//if left button is released
int clickX = EZInteraction.getXMouse(); //get x coordinates
int clickY = EZInteraction.getYMouse();//get y coordinates
if (hatPicture.isPointInElement(clickX, clickY)){//if hat is in the x and y coordinates
bluntSoundPlay = false; //turn all sounds false
weedSoundPlay = false;
dealwithitSoundPlay = false;
if (!hatSoundPlay) { //if hatsound not play
hatsound.play(); //hatsound will play
hatSoundPlay = true; //hat sound is now true
}
}
else if(bluntPicture.isPointInElement(clickX, clickY)){//if blunt is in the x and y coordinates
hatSoundPlay = false;//turn all sounds false
weedSoundPlay = false;
dealwithitSoundPlay = false;
if (!bluntSoundPlay) {//if bluntsound not play
bluntsound.play(); //then bluntsound will play
bluntSoundPlay = true; //bluntSoundPLay is now assigned to true
}
}
else if(dealwithitPicture.isPointInElement(clickX, clickY)){//if dealwithit is in the x and y coordinates
hatSoundPlay = false;//turn all sounds false
bluntSoundPlay = false;
weedSoundPlay = false;
if (!dealwithitSoundPlay) {//if dealwithitsound not play
dealwithitsound.play(); //then dealwithitsound will pay
dealwithitSoundPlay = true; //dealwithitSoundPlay is assigned as true
}
}
else if(weedPicture.isPointInElement(clickX, clickY)){//if weed is in the x and y coordinates
dealwithitSoundPlay = false;//turn all sounds false
hatSoundPlay = false;
bluntSoundPlay = false;
if (!weedSoundPlay) {//if weedsound not play
weedsound.play(); //then weedsound will play
weedSoundPlay = true; //sets the varialbe weedSoundPlay to true
}
}
else if (backgroundPicture.isPointInElement(clickX, clickY) && !savePicture.isPointInElement(clickX, clickY)
&& !loadPicture.isPointInElement(clickX, clickY) && !clearPicture.isPointInElement(clickX, clickY)
&& !rectanglePicture.isPointInElement(clickX, clickY)){
if (hatSoundPlay){ //if hatSoundPlay is true
hatsound.play(); //and a hatsound will play
sticker sticker1 = new sticker();//creates a new sticker1
sticker1.arraysticker(hatPicture, "hat.png", clickX, clickY);//places sticker
image ++;//increments image by 1
arraysticker[image] = sticker1;//puts sticker 1 into the array
} else if (bluntSoundPlay){ //else if bluntSound is true
bluntsound.play(); //and blunt sound will play
sticker sticker2 = new sticker();
sticker2.arraysticker(bluntPicture, "blunt.png", clickX, clickY);//places sticker
image ++;//increments image by 1
arraysticker[image] = sticker2;//puts sticker 2 into the array
}else if (dealwithitSoundPlay){ //if dealwithitsound is true
dealwithitsound.play(); //dealwithitsound will play
sticker sticker3 = new sticker();
sticker3.arraysticker(dealwithitPicture, "dealwithit.png", clickX, clickY);//places sticker
image ++;//increments image by 1
arraysticker[image] = sticker3;//puts sticker 3 into the array
}else if (weedSoundPlay){ //if weedsound is true
weedsound.play(); //weedsound will also play
sticker sticker4 = new sticker();
sticker4.arraysticker(weedPicture, "weed.png", clickX, clickY);//places sticker
image ++;//increments image by 1
arraysticker[image] = sticker4;//puts sticker 4 into the array
}
}
else if (savePicture.isPointInElement(clickX, clickY)){
FileWriter fw = new FileWriter("save.txt");
for (int i = 0; i < image; i++){
if (arraysticker[image] != null){
String name;
int x,y;
name = sticker.getname();
x = sticker.getx();
y = sticker.gety();
fw.write(name + " " + x + " " + y + "\n");
}
}
fw.flush();
fw.close();
System.out.println("saved");
}
// else if (loadPicture.isPointInElement(clickX, clickY)){
// Scanner sc = new Scanner (new File ("save.txt"));
// for (int i = 0; i < arraysticker.length; i++){
// hatPicture.removeImage;
//}
//}
}
EZ.refreshScreen();
}
}
}
答案 0 :(得分：0)
您的for-loop使用了错误的index值...
for (int i = 0; i < image; i++){
if (arraysticker[image] != null){
您还没有访问arraysticker中的值，它应该是
for (int i = 0; image < arraysticker.length; i++){
if (arraysticker[i] != null){
String name;
int x,y;
name = arraysticker[i].getname();
x = arraysticker[i].getx();
y = arraysticker[i].gety();
fw.write(name + " " + x + " " + y + "\n");
}
您还应该看看The try-with-resources Statement，以便更好地管理资源并确保资源正常关闭