public double DWfromM() {
        if(t<=30)
        {
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=60)
        {
            int k;
            k=60-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=90)
        {
            int k;
            k=t-60;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=120)
        {
            int k;
            k=120-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=150)
        {
            int k;
            k=t-120;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=180)
        {
            int k;
            k=180-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=210)
        {
            int k;
            k=t-180;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=240)
        {
            int k;
            k=240-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=270)
        {
            int k;
            k=t-240;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=300)
        {
            int k;
            k=300-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=330)
        {
            int k;
            k=t-300;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=360)
        {
            int k;
            k=360-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=390)
        {
            int k;
            k=t-360;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=420)
        {
            int k;
            k=420-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=450)
        {
            int k;
            k=t-420;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=480)
        {
            int k;
            k=480-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=510)
        {
            int k;
            k=t-480;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=540)
        {
            int k;
            k=540-t;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=570)
        {
            int k;
            k=t-540;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=600)
        {
            int k;
            k=600-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        else if(t<=630)
        {
            int k;
            k=t-600;
            DWGeneration +=(Math.exp(workedDAreaGrowthM * t) - DWGeneration;
            t++;
        }
        
        return DWGeneration;
    }

公式中的t应该是k，不好意思啊

private int t=0;
public double DWfromM() {
        if(t<=30)
        {
            int k;
            k=t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=60)
        {
            int k;
            k=60-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=90)
        {
            int k;
            k=t-60;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=120)
        {
            int k;
            k=120-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=150)
        {
            int k;
            k=t-120;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=180)
        {
            int k;
            k=180-t;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=210)
        {
            int k;
            k=t-180;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=240)
        {
            int k;
            k=240-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=270)
        {
            int k;
            k=t-240;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=300)
        {
            int k;
            k=300-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=330)
        {
            int k;
            k=t-300;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=360)
        {
            int k;
            k=360-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=390)
        {
            int k;
            k=t-360;
             DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
            t++;
        }
        else if(t<=420)
        {
            int k;
            k=420-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=450)
        {
            int k;
            k=t-420;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=480)
        {
            int k;
            k=480-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=510)
        {
            int k;
            k=t-480;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=540)
        {
            int k;
            k=540-t;
           DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=570)
        {
            int k;
            k=t-540;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=600)
        {
            int k;
            k=600-t;
            DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        else if(t<=630)
        {
            int k;
            k=t-600;
             DWGeneration += (Math.exp(workedDAreaGrowthM * k) - DWGeneration;
        }
        t++；
        return DWGeneration;
    }
主要是想要实现计算的时候仿真时间t取0-30，计算时k取0-30，仿真时间t取31-60，计算时k取30-0，仿真时间t取61-90，计算时k取0-30，仿真时间t取91-120，计算时k取30-0，这种循环一直下去，怎么是实现？求指教，谢谢。