How to store data for a long time in java-the kind that doesn't need a database

Answer 1

You can use files or memory to store long-term data in the following ways:
1 Use file storage: You can use the File object in Java to create a file and write data to it. You can use the IO-stream of Java to read and write files to achieve persistent storage of data. For example:

```
File file = new File(datatxt);
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String line;
while ((line = readerreadLine()) != null) {
//process the read text data
}
readerclose();
} catch (IOException e) {
//Handle the case of file reading failure
}
```

2. Use Memory Storage: You can use the memory pool in Java to store data in memory to avoid frequent reading and writing of files to improve program performance and efficiency. You can use the pool of objects in Java to manage the memory.

```
int[] arr = new int[100];
int sum = 0;
try {
MemoryPool memoryPool = MemoryPoolget();
object pool = memoryPoolselect();
for (int i = 0; i < arrlength; i++) {
arr[i] = (arr[i] + sum) % arrlength;
sum += arr[i];
}
close();
} catch (IOException e) {
//Handle the memory pool operation failure
}
```

You can choose one of the two methods to store data for a long time. It should be noted that long-term storage of data requires consideration of data security and reliability to avoid data loss or leakage.