Java 8, how can I implement a switch statement using streams?

Question

I have a text file imgui.ini containing:

[Debug]
Pos=7,79
Size=507,392
Collapsed=0

[ImGui Demo]
Pos=320,5
Size=550,680
Collapsed=0

Answer 1

Another way to read your config file:

public class Main {
    public static void main(String[] args) throws IOException {
        Path path = Paths.get("D:\\Development\\workspace\\Application\\src\\main\\resources\\init.txt");
        String content = new String(Files.readAllBytes(path));

        Map configMap = Stream.of(content.split("\\n\\r"))
            .map(config -> Arrays.asList(config.split("\\r")))
            .collect(HashMap::new, (map, list) -> {
                String header = list.get(0);
                String pos = list.get(1);
                String size = list.get(2);
                String collapsed = list.get(3);
                map.put(header, new Config(pos.substring(pos.indexOf("=") + 1), size.substring(size.indexOf("=") + 1), collapsed.substring(collapsed.indexOf("=") + 1)));
            }, (m, u) -> {});

        System.out.println(configMap);
    }
}

class Config {
    public String pos;
    public String size;
    public String collapsed;

    public Config(String pos, String size, String collapsed) {
        this.pos = pos;
        this.size = size;
        this.collapsed = collapsed;
    }

    @Override
    public String toString() {
        return "Config{" +  "pos='" + pos + '\'' + ", size='" + size + '\'' + 
               ", collapsed='" + collapsed + '\'' + '}';
    }
}

Result will be map:

{
    [Debug]=Config{pos='7,79', size='507,392', collapsed='0'}, 
    [ImGui Demo]=Config{pos='320,5', size='550,680', collapsed='0'}
}