堆异常 内存溢出 求大侠赐教

Question

Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Unknown Source)
at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown Source)
at java.lang.AbstractStringBuilder.append(Unknown Source)
at java.lang.StringBuilder.append(Unknown Source)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
at HM_DataBase.DataGained.delStuff(DataGained.java:167)
内存溢出异常heap

Answer 1

堆溢出了，检查你的程序是不是用了大量的内存吧。包括对String的反复使用，对大对象的不断创立等等。优化一下程序。

Answer 2

public void actionPerformed(ActionEvent e){

if(stufftxt.getText().equals("") || stufftxt.getText() == null){
JOptionPane.showMessageDialog(null, "请填写完整信息", "友情提示", JOptionPane.INFORMATION_MESSAGE);
}else{
boolean isSucceed= DataGained.getInstance().delStuff(stufftxt.getText());
if(isSucceed == true){
JOptionPane.showMessageDialog(MainFrame.this, "删除成功", "友情提示", JOptionPane.INFORMATION_MESSAGE);
}
}
}public boolean delStuff(String id){ 
return delStuff(" delete hm_user where id = '" + id + "'");
}
protected boolean delStuff(String sql){
boolean isSucceed = true;
Connection dbConn = DataLinked.getConnection();
try{
Statement stmt = dbConn.createStatement();
stmt.executeUpdate(sql);
stmt.close();
}catch(SQLException e){
isSucceed = false;
e.printStackTrace();
}
return isSucceed;
}