将字符串子集转换为数组变量的最佳方法是什么？

Question

I have a string like this;

abc 1/2/3 3/4/5 4/5/6 6/7/7 efg 1 2 3 4 ...

I want to make it into;

String[] abc = {1/2/3, 3/4/5, 4/5/6, 6/7/7}
int[] efg = {1, 2, 3, 4}

where abc, efg are variables NOT hardcoded but obtained from the string. My sample code doesn't work, so I am not posting it here. Please let me know what is the most efficient way to achieve this. Thanks!

Answer 1

Here is working script which gets very close to your stated requirements. It generates a map of key names, where the values of arrays of strings. I do not map an effort to map to different types of arrays, which just adds complexity, and maybe is even out of scope for what you intend to do with this code.

Map<String, String[]> map = new HashMap<>();
String input = "abc 1/2/3 3/4/5 4/5/6 6/7/7 efg 1 2 3 4";
String[] exps = input.split("\\s+(?=[A-Za-z]+)");
for (String exp : exps) {
    String[] parts = exp.split("\\s+");
    map.put(parts[0], Arrays.copyOfRange(parts, 1, parts.length));
}

// iterate each name, and then print out each string in a given array
for (Map.Entry<String, String[]> entry : map.entrySet()) {
    for (String val : entry.getValue()) {
        System.out.println(entry.getKey() + ": " + val);
    }
}

abc: 1/2/3
abc: 3/4/5
abc: 4/5/6
abc: 6/7/7
efg: 1
efg: 2
efg: 3
efg: 4

If you wanted to make the map more generic, you might have to map string names to Object . But, this doesn't feel clean to me, and I would rather just map every name to an array of the same type.

To access, for example, the second value for name efg , you would use:

map.get("efg")[1]