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How to check whether the elements of an ArrayList are all contained in another ArrayList

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How can I easily check to see whether all the elements in one ArrayList are all elements of another ArrayList? Use Collection.containsAll() : boolean isSubset = listA.containsAll(listB); There is a containsAll method in all collections. 来源： https://stackoverflow.com/questions/808394/how-to-check-whether-the-elements-of-an-arraylist-are-all-contained-in-another-a

How to check whether the elements of an ArrayList are all contained in another ArrayList

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问题 How can I easily check to see whether all the elements in one ArrayList are all elements of another ArrayList? 回答1: Use Collection.containsAll(): boolean isSubset = listA.containsAll(listB); 回答2: There is a containsAll method in all collections. 来源： https://stackoverflow.com/questions/808394/how-to-check-whether-the-elements-of-an-arraylist-are-all-contained-in-another-a

Restrict jQuery draggable items from overlapping/colliding with sibling elements

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I need to use jQuery UI to restrict the containment area for draggable object with some additional restriction. I need prevent the draggable element from overlapping with other elements within the same container. I need to allow movement in "moveInHere" area but not "butNotHere" area. Is it possible? <div id="moveInHere"> <div id="dragMe"> </div> <div id="butNotHere"> </div> </div> <script type="text/javascript"> $("#dragMe").draggable({ containment: "#moveInHere" }); </script> Edit: New Solution I found a plugin for this called JQuery UI Draggable Collision . Using this, implementing your