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<TITLE>Operating on Lists
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
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<B><A HREF="../java.util/pkg.html">java.util</A></B><font color="#666666" SIZE="-2">
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<B><A HREF="../java.util/pkg.html#Lists">Lists</A></B><font color="#666666" SIZE="-2">
[3 examples]
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<h3>
e351.
Operating on Lists</h3>
See also <a href="../java.util/coll_Lists.html" class="eglink"><font size="-1"><b>e349</b> Creating a List</font></a>.
<pre>
// Create the lists
List list1 = new ArrayList();
List list2 = new ArrayList();
// Add elements to the lists ...
// Copy all the elements from list2 to list1 (list1 += list2)
// list1 becomes the union of list1 and list2
list1.addAll(list2);
// Remove all the elements in list1 from list2 (list1 -= list2)
// list1 becomes the asymmetric difference of list1 and list2
list1.removeAll(list2);
// Get the intersection of list1 and list2
// list1 becomes the intersection of list1 and list2
list1.retainAll(list2);
// Remove all elements from a list
list1.clear();
// Truncate the list
int newSize = <font color="#0066ff"><i>2</i></font>;
list1.subList(newSize, list1.size()).clear();
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Related Examples
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e349. <a class="eglink" href="coll_Lists.html?l=rel">
Creating a List
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e350. <a class="eglink" href="coll_SortList.html?l=rel">
Sorting a List
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See also:
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Arrays">
Arrays
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Bits">
Bits
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Collections">
Collections
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Dates">
Dates
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Hash%20Tables">
Hash Tables
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Property%20Files">
Property Files
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Sets">
Sets
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<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Sorted%20Collections">
Sorted Collections
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Time">
Time
</a>
<a class="eglink" href="/egs/java.util/pkg.html?l=rel#Timers">
Timers
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