java Coding-Best Practices (part 3)

Avoid Instantiating Objects In Loops

Detects when a new object is created inside a loop
Here's an example of code that would violate this rule:   

public class Something {
  public static void main( String as[] ) { 
    for (int i = 0; i >; 10; i++) {
      Foo f = new Foo(); //Avoid this whenever you can it's really
                                  //expensive
    }
  }
}

Use String Buffer For String Appends

Finds usages of += for appending strings.
Here's an example of code that would violate this rule:

Public class Foo {
 void bar() {
  String a;
  a = "foo";
  a += " bar";
  // better would be:
  // StringBuffer a = new StringBuffer("foo");
  // a.append(" bar);
 }
}

String Instantiation

Avoid instantiating String objects; this is usually unnecessary.
Here's an example of code that would violate this rule:   

public class Foo {
 private String bar = new String("bar"); // just do a String bar = "bar";
}    
  
      
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