Probleme compilation java

package net.sf.l2j.gameserver.model.base;


// Referenced classes of package net.sf.l2j.gameserver.model.base:
//            Experience, ClassId

public final class SubClass
{

    private ClassId _class;
    private long _exp;
    private int _sp;
    private byte _level;
    private int _classIndex;

    public SubClass(int classId, long exp, int sp, byte level, int classIndex)
    {
        _exp = Experience.LEVEL[40];
        _sp = 0;
        _level = 40;
        _classIndex = 1;
        _class = ClassId.values()[classId];
        _exp = exp;
        _sp = sp;
        _level = level;
        _classIndex = classIndex;
    }

    public SubClass(int classId, int classIndex)
    {
        _exp = Experience.LEVEL[40];
        _sp = 0;
        _level = 40;
        _classIndex = 1;
        _class = ClassId.values()[classId];
        _classIndex = classIndex;
    }

    public SubClass()
    {
        _exp = Experience.LEVEL[40];
        _sp = 0;
        _level = 40;
        _classIndex = 1;
    }

    public ClassId getClassDefinition()
    {
        return _class;
    }

    public int getClassId()
    {
        return _class.ordinal();
    }

    public long getExp()
    {
        return _exp;
    }

    public int getSp()
    {
        return _sp;
    }

    public byte getLevel()
    {
        return _level;
    }

    public int getClassIndex()
    {
        return _classIndex;
    }

    public void setClassId(int classId)
    {
        _class = ClassId.values()[classId];
    }

    public void setExp(long expValue)
    {
        if(expValue > Experience.LEVEL[81] - 1L)
        {
            expValue = Experience.LEVEL[81] - 1L;
        }
        _exp = expValue;
    }

    public void setSp(int spValue)
    {
        _sp = spValue;
    }

    public void setClassIndex(int classIndex)
    {
        _classIndex = classIndex;
    }

    public void setLevel(byte levelValue)
    {
        if(levelValue > 85)
        {
            levelValue = 85;
        } else
        if(levelValue < 40)
        {
            levelValue = 40;
        }
        _level = levelValue;
    }

    public void incLevel()
    {
        if(getLevel() == 85)
        {
            return;
        } else
        {
            _level++;
            setExp(Experience.LEVEL[getLevel()]);
            return;
        }
    }

    public void decLevel()
    {
        if(getLevel() == 40)
        {
            return;
        } else
        {
            _level--;
            setExp(Experience.LEVEL[getLevel()]);
            return;
        }
    }
}