Do you know how to init list in other way except for new object? The following will give you serveral tips. If having other great idea, you are welcome to share.
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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public class ListUtil
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{
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public static void init()
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{
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List<String> firstList = new ArrayList<String>(0);
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firstList.add("ABC");
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firstList.add("FGF");
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firstList.add("CID");
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System.out.println(firstList);
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List<String> testList = Arrays.asList("ABC", "FGF", "CID");
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System.out.println(testList);
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List<String> copyList = Arrays.asList(new String[testList.size()]);
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Collections.copy(copyList,testList);
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System.out.println(copyList);
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copyList = new ArrayList<String>();
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Collections.addAll(copyList, new String[testList.size()]);
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Collections.copy(copyList,testList);
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System.out.println(copyList);
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List<String> strSubList = testList.subList(0, testList.size());
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System.out.println(strSubList);
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};
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public static void main(String[] args)
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{
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ListUtil.init();
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}
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}
The result is :
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[ABC, FGF, CID]
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[ABC, FGF, CID]
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[ABC, FGF, CID]
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[ABC, FGF, CID]
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[ABC, FGF, CID]
【DataStructure】 Five methods to init the List in java,布布扣,bubuko.com
【DataStructure】 Five methods to init the List in java
原文：http://blog.csdn.net/sxb0841901116/article/details/38548891
