Remove If -Else from your code

Sometimes, our code is full of if-else condition. so it is not easy to understand it y another colleagues.

So, as a beginner, or experienced, should make your code more sophisticated and readable.

The first thing we need to try is removing if-else from our code. Here are some advice.

Option 1: Early return

Suppose there is the following code:

public boolean isValid(String userName) {
    boolean isValid;
    if (userName != null){
        if (userName.equals("Tom")) {
            isValid = true;
        } else {
            isValid = false;
        }
    } else {
        isValid= false;
    }
    return isValid;
}

This is the kind of code that we generally use to return early, removing the unnecessary else.

public boolean isValid(String userName) {
    if (userName != null && userName.equals("Tom")) {
        return true;
    }
    return false;
}

This approach is generally only suitable for simple structures and we can return early to get rid of some of the unnecessary if-else.

Option 2: Enumeration

Suppose there is the following code:

public String getLabel(int status) {
    String label = "";
    if (1 == status) {
        label = "Padding";
    } else if (2 == status) {
        label = "Paid";
    } else if (3 == status) {
        label = "Success";
    } else if (4 == status) {
        label =…