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    <p>split maybe aspect memory if you just want to use one or few arrays of the long string. the long string will always in memory. like</p> <pre><code>private static List&lt;String&gt; headlist = new ArrayList&lt;String&gt;(); String longstring = "....."; headlist.add(longstring.split(" ")[0]); </code></pre> <p>than the longstring will always in memory. JVM cannot gc it.</p> <p>in this situation, I think maybe you can try</p> <pre><code>private static List&lt;String&gt; headlist = new ArrayList&lt;String&gt;(); String longstring = "....."; headlist.add(new String(longstring.split(" ")[0])); </code></pre> <p>as following code</p> <pre><code>import java.util.ArrayList; import java.util.List; import java.util.Random; public class SplitTest { static Random rand = new Random(); static List&lt;String&gt; head = new ArrayList&lt;String&gt;(); /** * @param args */ public static void main(String[] args) { while(true) { String a = constructLongString(); head.add(a.split(" ")[0]); //1 //head.add(new String(a.split(" ")[0])); //2 if (i % 1000 == 0) System.out.println("" + i); System.gc(); } } private static String constructLongString() { StringBuilder sb = new StringBuilder(); for (int i = 0; i &lt; 10; i++) { sb.append(rand.nextInt(10)); } sb.append(" "); for (int i = 0; i &lt; 4096; i++) { sb.append(rand.nextInt(10)); } return sb.toString(); } } </code></pre> <p>if you running with -Xmx60M, it will outofmemory about 6000+ and if you using code line 2, comment the line 1, then it running long time more bigger than 6000</p>
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    1. POMemory issues with String.split()
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    1. COhi, good point and thanks. I will check the code to see whether the mistake exists
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