首先，需要创建一个 Image 接口，用于定义背景图片的基本操作方法：
public interface Image {
void display();
}
然后，实现 Image 接口的 RealImage 类，用于加载和显示真实的背景图片：
public class RealImage implements Image {
private String fileName;
public RealImage(String fileName) {
this.fileName = fileName;
loadFromDisk(fileName);
}
@Override
public void display() {
System.out.println("Displaying " + fileName);
}
private void loadFromDisk(String fileName) {
System.out.println("Loading " + fileName);
}
}
最后，创建代理类 ProxyImage，当需要显示背景图片时，通过代理类来获取 RealImage 对象，并进行相应操作。
public class ProxyImage implements Image {
private String fileName;
private RealImage realImage;
public ProxyImage(String fileName) {
this.fileName = fileName;
}
@Override
public void display() {
if (realImage == null) {
realImage = new RealImage(fileName);
}
realImage.display();
}
}
这样，在界面中使用代理模式加载背景图片就可以减少内存占用了。例如：
// 创建代理对象并设置背景图片文件名
ProxyImage proxyImage = new ProxyImage("background.jpg");
// 显示背景图片
proxyImage.display();
![func orangesRotting(grid [][]int) int {
var totalOrigin, curOrigin, totalTime int
queue := make([][2]int, 0)
height := len(grid)
width := len(grid[0])
for i := 0; i < height; i++ {
for j := 0; j < width; j++ {
if grid[i][j] == 1 {
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![root@ght:~# journalctl -u lsyncd.service -n 10
-- Logs begin at Mon 2023-08-14 02:38:05 UTC, end at Thu 2024-10-31 01:05:02 UTC. --
Oct 31 00:47:51 ght systemd[1]: lsyncd.service: Succeeded.
Oct 31 00:50:50 ght systemd[1]: Started Lsync Service.
O...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162232428008348.png)
![func orangesRotting(grid [][]int) int {
var totalOrigin, curOrigin, totalTime int
queue := make([][2]int, 0)
height := len(grid)
width := len(grid[0])
for i := 0; i < height; i++ {
for j := 0; j < width; j++ {
...](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162215084030351.png)
