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How do I break out of nested loops in Java?

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梦毁少年i
梦毁少年i 2020-11-21 11:51

I\'ve got a nested loop construct like this:

for (Type type : types) {
    for (Type t : types2) {
         if (some condition) {
             // Do somethin
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  • 天命终不由人
    天命终不由人 (楼主)
    2020-11-21 12:04

    Usually in such cases, it is coming in scope of more meaningful logic, let's say some searching or manipulating over some of the iterated 'for'-objects in question, so I usually use the functional approach:

    public Object searching(Object[] types) { // Or manipulating
    List typesReferences = new ArrayList();
    List typesReferences2 = new ArrayList();

    for (Object type : typesReferences) {
        Object o = getByCriterion(typesReferences2, type);
        if(o != null) return o;
    }
    return null;
}

private Object getByCriterion(List typesReferences2, Object criterion) {
    for (Object typeReference : typesReferences2) {
        if(typeReference.equals(criterion)) {
             // here comes other complex or specific logic || typeReference.equals(new Object())
             return typeReference;
        }
    }
    return null;
}



    Major cons:
    


      

    • roughly twice more lines
      • 

    • more consumption of computing cycles, meaning it is slower from algorithmic point-of-view
      • 

    • more typing work
      • 

    


    The pros:
    


      

    • the higher ratio to separation of concerns because of functional granularity
      • 

    • the higher ratio of re-usability and control of
searching/manipulating logic without
      • 

    • the methods are not long, thus they are more compact and easier to comprehend
      • 

    • higher ratio of readability
      • 

    


    So it is just handling the case via a different approach.
    


    Basically a question to the author of this question: what do you consider of this approach?
    
    
    
             
    
                                                        
    
            
            
    
              
                
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