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컬렉션프레임웍(Collections Framework) - ArrayList 본문

자바/Collections Framework

컬렉션프레임웍(Collections Framework) - ArrayList

은은하게미친자 2022. 10. 2. 02:02
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        //ArrayList
        ArrayList<Integer> a = new ArrayList<Integer>() ;
        for (int i= 0;i<10;i++) {
            a.add(i);
        }
        System.out.println("arraylist "  + a.toString()); 
        System.out.println("index " + a.get(0)); 
        System.out.println("index " + a.get(1)); 
        System.out.println("index " + a.get(2)); 
        a.add(1,10);
        System.out.println("arraylist "  + a.toString()); 
        System.out.println("indexOf " + a.indexOf(0)); 
        System.out.println("indexOf " + a.indexOf(1)); 
        System.out.println("indexOf " + a.indexOf(2)); 
        System.out.println("contains?10? " + a.contains(10)); 
        System.out.println("contains?11? " + a.contains(11)); 
        a.remove(3);
        System.out.println(a.toString()); 
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