String連接期間java.lang.OutOfMemoryError

在String連接期間，我得到java.lang.OutOfMemoryError。有人能幫我擺脫這個嗎？以下是我的代碼的外觀。如果blokc在循環中運行，並且它處理「str」的字符串連接，則會引發OutofemoryError。任何幫助，非常感謝。String連接期間java.lang.OutOfMemoryError

for (long j = mincollectiontime; j <= maxcollectiontime; j = j 
     + timeintreval) { 
    query = "select count(*) table1"; 

    ResultSet result2 = VerticaDBHandler.executequery(con2, query); 
    System.out.println("Query:- " + query); 

    String str = ""; 
    if (result2.isBeforeFirst()) { 
     if (mysqlconn == null) { 
      mysqlconn = DatabaseHandler.openDB(); 
     } 

     while (result2.next()) { 
      int isgap = Integer.parseInt(result2.getString(1)); 
      if (isgap == 0) { 
       Date startime = EpochTimeHandler.epochToTimeStamp(j); 
       Date endtime = EpochTimeHandler.epochToTimeStamp(j 
         + timeintreval); 
       str = "NO DATA BETWEEN " + startime + " --- " + endtime 
         + " forInstanceId: " + instanceid 
         + " --InstanceName: " + instanceName + " in " 
         + perfTables[i]; 
       DatabaseHandler.LoadDB_dataGaps(mysqlconn, 
         perfTables[i], instanceid, instanceName, 
         VirtType, BelongstoDataCenter, 
         startime.toString(), endtime.toString(), str); 
       System.out.println(str); 
       str = ""; 
      } else { 
       System.out.println("No Gap Seen"); 
      } 
     } 
    } 
}

例外。

Exception thrown: 
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space 
    at java.util.LinkedHashMap.newNode(LinkedHashMap.java:256) 
    at java.util.HashMap.putVal(HashMap.java:630) 
    at java.util.HashMap.put(HashMap.java:611) 
    at sun.util.resources.OpenListResourceBundle.loadLookup(OpenListResourceBundle.java:146) 
    at sun.util.resources.OpenListResourceBundle.loadLookupTablesIfNecessary(OpenListResourceBundle.java:128) 
    at sun.util.resources.OpenListResourceBundle.handleKeySet(OpenListResourceBundle.java:96) 
    at java.util.ResourceBundle.containsKey(ResourceBundle.java:1807) 
    at sun.util.locale.provider.LocaleResources.getTimeZoneNames(LocaleResources.java:262) 
    at sun.util.locale.provider.TimeZoneNameProviderImpl.getDisplayNameArray(TimeZoneNameProviderImpl.java:122) 
    at sun.util.locale.provider.TimeZoneNameProviderImpl.getDisplayName(TimeZoneNameProviderImpl.java:98) 
    at sun.util.locale.provider.TimeZoneNameUtility$TimeZoneNameGetter.getName(TimeZoneNameUtility.java:325) 
    at sun.util.locale.provider.TimeZoneNameUtility$TimeZoneNameGetter.getObject(TimeZoneNameUtility.java:281) 
    at sun.util.locale.provider.TimeZoneNameUtility$TimeZoneNameGetter.getObject(TimeZoneNameUtility.java:267) 
    at sun.util.locale.provider.LocaleServiceProviderPool.getLocalizedObjectImpl(LocaleServiceProviderPool.java:281) 
    at sun.util.locale.provider.LocaleServiceProviderPool.getLocalizedObject(LocaleServiceProviderPool.java:265) 
    at sun.util.locale.provider.TimeZoneNameUtility.retrieveDisplayName(TimeZoneNameUtility.java:135) 
    at java.util.TimeZone.getDisplayName(TimeZone.java:400) 
    at java.util.Date.toString(Date.java:1045) 
    at java.lang.String.valueOf(String.java:2982) 
    at java.lang.StringBuilder.append(StringBuilder.java:131) 
    at com.test.perf.testpgm.main(testpgm.java:112)

來源

2015-12-01 Vikram

需要查看更多代碼。發佈for循環？另外，你已經嘗試過什麼？你有沒有試過調試器？ – Aify

你能不能粘貼整個班級 – nullpointer

完整的代碼在內嵌上面編輯 – Vikram

看起來像這裏是問題。

for (long j = mincollectiontime; j <= maxcollectiontime; j = j + timeintreval)

你絕對排除了最大長度，並在函數中調用。請發佈更多代碼，以便發現具體問題。

來源

2015-12-01 05:59:41

可能是這個問題與字符串的排除無關，我覺得這個問題與堆大小有關。一旦增加IDE的堆大小並運行該程序。

來源

2015-12-01 07:05:20

String連接期間java.lang.OutOfMemoryError

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