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Explore Stack InternalThe add method returns a boolean indicating whether or not the add succeeded. Might be clearer with indenting:
Set<String> s = new HashSet<String>(); for(String a:args) if(!s.add(a)) System.out.println("Duplicate detected:"+a); Or even better with braces:
Set<String> s = new HashSet<String>(); for(String a:args) { if(!s.add(a)) { System.out.println("Duplicate detected:"+a); } } The message is displayed if the add failed.
The add method returns a boolean indicating whether or not the add succeeded. Might be clearer with indenting:
Set<String> s = new HashSet<String>(); for(String a:args) if(!s.add(a)) System.out.println("Duplicate detected:"+a); The message is displayed if the add failed.
The add method returns a boolean indicating whether or not the add succeeded. Might be clearer with indenting:
Set<String> s = new HashSet<String>(); for(String a:args) if(!s.add(a)) System.out.println("Duplicate detected:"+a); Or even better with braces:
Set<String> s = new HashSet<String>(); for(String a:args) { if(!s.add(a)) { System.out.println("Duplicate detected:"+a); } } The message is displayed if the add failed.
The add method returns a boolean indicating whether or not the add succeeded. Might be clearer with indenting:
Set<String> s = new HashSet<String>(); for(String a:args) if(!s.add(a)) System.out.println("Duplicate detected:"+a); The message is displayed if the add failed.