我似乎无法在cmd(directory: C:\Program Files\Java\jdk1.8.0_05\bin).
错误说
rectangle.java:12: error while writing rectangle: rectangle.class <Access is denied> public class rectangle extends Applet
我的代码：
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.lang.*;
/*
<applet code="rectangle" height=500 width=700>
</applet>
*/
public class rectangle extends Applet
{
int apw1[];
int p[];
int i=0,n,n1;
Graphics g= getGraphics();
public void init()
{
try
{
BufferedReader obj=new BufferedReader(new InputStreamReader (System.in));
System.out.println("ENTER no. of processes:");
n=Integer.parseInt(obj.readLine());
int ch;
int bt[]=new int[n];
do{
System.out.println("MENU FOR CPU SCHEDULING");
System.out.println("1.FCFS method");
System.out.println("2.SHORTEST JOB FIRST method(non-preemptive)");
System.out.println("3.SHORTEST JOB FIRST method(preemptive)");
System.out.println("4.ROUND ROBIN method");
System.out.println("5.PRIORITY method (non-preemptive)");
System.out.println("6.PRIORITY method (preemptive)");
System.out.println("7.EXIT");
System.out.println("ENTER YOUR CHOICE");
ch=Integer.parseInt(obj.readLine());
switch(ch)
{
case 1:
{
for( i=0;i<n;i++)
{System.out.println("ENTER burst time for each process: p"+(i+1));
bt[i]=Integer.parseInt(obj.readLine());
}
n1=n;
int turn[]=new int[n];
apw1=new int[n+1];
apw1[0]=0;
float t=0;
float tu=0;
p=new int[n];
for( i=1;i<=n;i++)
apw1[i]=bt[i-1]+apw1[i-1];
for( i=0;i<n;i++)
{
System.out.println("indivisual waiting time for process p"+(i+1)+"is"+apw1[i]+" ");
}
for(i=0;i<n;i++)
{
p[i]=i+1;
System.out.print(p[i]);
}
for( i=0;i<n;i++)
t+=apw1[i];
float avg=t/n;
System.out.println("average waiting time is:"+avg);
/*for( i=0;i<n;i++)
System.out.println("response time for process p"+(i+1)+"is"+apw1[i]+" ");*/
for( i=0;i<n;i++)
{
turn[i]=bt[i]+apw1[i];
System.out.println("turnaround time for process p"+(i+1)+"is"+turn[i]+" ");
}
for( i=0;i<n;i++)
tu+=turn[i];
float avg1=tu/n;
System.out.println("average turn-around time is:"+avg1);
paint(g);
}
break;
case 2:
{
for( i=0;i<n;i++)
{System.out.println("ENTER burst time for each process: p"+(i+1));
bt[i]=Integer.parseInt(obj.readLine());
}
n1=n;
int temp;
float t=0;
int turn[]=new int[n];
apw1=new int[n+1];
apw1[0]=0;
p=new int[n];
int sj[]=new int[n];
float tu=0;
for( i=0;i<n;i++)
sj[i]=bt[i];
for( i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(sj[i]>sj[j])
{
temp=sj[i];
sj[i]=sj[j];
sj[j]=temp;
}
for( i=0;i<n;i++)
for(int j=0;j<n;j++)
if(sj[i]==bt[j])
p[i]=j+1;
for(i=0;i<n;i++)
apw1[i+1]=sj[i]+apw1[i];
for( i=0;i<n;i++)
{
System.out.println("indivisual waiting time for process p"+p[i]+"is"+apw1[i]+" ");
}
for( i=0;i<n;i++)
t+=apw1[i];
float avg=t/n;
System.out.println("average waiting time is:"+avg);
/*for( i=0;i<n;i++)
System.out.println("response time for process p"+p[i]+"is"+apw1[i]+" ");*/
for( i=0;i<n;i++)
{
int k=p[i];
turn[i]=bt[k-1]+apw1[i];
System.out.println("turnaround time for process p"+p[i]+"is"+turn[i]+" ");
}
for( i=0;i<n;i++)
tu+=turn[i];
float avg1=tu/n;
System.out.println("average turn-around time is:"+avg1);
paint(g);
}
break;
case 3:
{
int total=0,k=0,co=0,small=999,sp=0,sp1=0,x=0,count=0;
int pro[][]=new int[n][3];
int wt[]=new int[n];
int wt1[]=new int[n];
int bt1[]=new int[n];
int tt[]=new int[n];
apw1=new int [20];
p=new int[20];
for(int i=0;i<n;i++)
{
pro[i][0]=i;
System.out.print("Burst Time for P"+i+" :");
pro[i][1]=Integer.parseInt(obj.readLine());
total+=pro[i][1];
System.out.print("Arrival Time for P"+i+" :");
pro[i][2]=Integer.parseInt(obj.readLine());
}
for(int i=0;i<n;i++)
wt1[i]=pro[i][2];
for(int i=0;i<n;i++)
bt1[i]=pro[i][1];
for(int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(pro[i][2]>pro[j][2])
{
int temp[]=pro[i];
pro[i]=pro[j];
pro[j]=temp;
}
for(int i=1;i<=total;i++)
{
small=999;
for(int j=co;j<n;j++)
if(k>=pro[j][2])
co++;
for(int j=0;j<co;j++)
{
if(small>pro[j][1]&&pro[j][1]!=0)
{
small=pro[j][1];
sp=pro[j][0];
sp1=j;
}
}
if(p[x]==sp)
{
apw1[x+1]++;
}
else
{
x++;
p[x]=sp;
apw1[x+1]=apw1[x];
apw1[x+1]++;
count++;
}
pro[sp1][1]-=1;
if(pro[sp1][1]==0)
tt[sp1]=i;
for(int j=0;j<n;j++)
{
if(pro[j][1]!=0&&j!=sp)
wt[j]+=1;
}
k++;
}
for(int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(pro[i][0]>pro[j][0])
{
int temp[]=pro[i];
pro[i]=pro[j];
pro[j]=temp;
int tem=wt[i],tem1=tt[i];
wt[i]=wt[j];
wt[j]=tem;
tt[i]=tt[j];
tt[j]=tem1;
}
System.out.println();
for(int m=0;m<=count;m++)
p[m]+=1;
double awt=0.0,att=0.0;
System.out.println();
for (int i = 0; i<n; i++)
{
System.out.println("waiting time for process p "+i+" "+(wt[i]-wt1[i]));
awt+=(wt[i]-wt1[i]);
att+=(wt[i]-wt1[i]+bt1[i]);
}
for (int i = 0; i<n; i++)
{
System.out.println("turnaround time for process p"+i+" "+(wt[i]-wt1[i]+bt1[i]));
}
System.out.println("Average waiting time : "+(awt/n));
System.out.println("Average turnaround time : "+(att/n));
n1=count+1;
paint(g);
}
break;
case 4:
{
for( i=0;i<n;i++)
{System.out.println("ENTER burst time for each process: p"+(i+1));
bt[i]=Integer.parseInt(obj.readLine());
}
int ro[]=new int[n];
apw1=new int[20];
apw1[0]=0;
int sq[]=new int[20];
int temp;
float t=0;
float tu=0;
int apw[]=new int[n];
int bttime=0;
int turn[]=new int[n];
int f=0;
for(i=0;i<n;i++)
{
ro[i]=bt[i];
}
p=new int[30];
System.out.println("enter time quantum");
int ts=Integer.parseInt(obj.readLine());
int k=0;
sq[k]=0;
i=0;
temp=ts;
int count=0;
do
{
if(ro[i]==0)
{
i++;
sq[k]=sq[k-1]+temp;
}
else
if(ro[i]>=ts)
{
ro[i]=ro[i]-ts;
p[k]=i+1;
k++;
i++;
temp=ts;
sq[k]=sq[k-1]+temp;
turn[i-1]=sq[k];
f=0;
for(int m=0;m<n;m++)
f+=ro[m];
count++;
}
else
if(ro[i]>0 && ro[i]<ts)
{
temp=ro[i];
ro[i]=0;
p[k]=i+1;
i++;
k++;
sq[k]=sq[k-1]+temp;
turn[i-1]=sq[k];
f=0;
for(int m=0;m<n;m++)
f+=ro[m];
count++;
}
if(i==n)
i=0;
}while(f!=0);
System.out.println();
for(i=0;i<=count;i++)
{
apw1[i]=sq[i];
}
System.out.println();
for(i=0;i<n;i++)
{
apw[i]=turn[i]-bt[i];
t+=apw[i];
tu+=turn[i];
}
for(i=0;i<n;i++)
System.out.println(" waiting time for p"+(i+1)+"is:"+apw[i]);
float avg=t/n;
System.out.println("average waiting time is:"+avg);
for(i=0;i<n;i++)
System.out.println("turn around time is:"+turn[i]);
float avg1=tu/n;
System.out.println("average turn-around time is:"+avg1);
n1=count;
paint(g);
}
break;
case 5:
{
for( i=0;i<n;i++)
{System.out.println("ENTER burst time for each process: p"+(i+1));
bt[i]=Integer.parseInt(obj.readLine());
}
n1=n;
int pr[]=new int[n];
int pr1[]=new int[n];
float t=0;
int temp;
int turn[]=new int[n];
p=new int[n];
apw1=new int[n+1];
apw1[0]=0;
float tu=0;
for(i=0;i<n;i++)
{
System.out.println("Enter the priority for p"+(i+1));
pr[i]=Integer.parseInt(obj.readLine());
}
for(i=0;i<n;i++)
{
pr1[i]=pr[i];
}
for( i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(pr1[i]>pr1[j])
{
temp=pr1[i];
pr1[i]=pr1[j];
pr1[j]=temp;
}
for( i=0;i<n;i++)
for(int j=0;j<n;j++)
if(pr1[i]==pr[j])
p[i]=j+1;
for(i=0;i<n;i++)
{
int k=p[i];
apw1[i+1]=bt[k-1]+apw1[i];
}
for( i=0;i<n;i++)
{
System.out.println("indivisual waiting time for process p"+p[i]+"is"+apw1[i]+" ");
}
for( i=0;i<n;i++)
t+=apw1[i];
float avg=t/n;
System.out.println("average waiting time is:"+avg);
/*for( i=0;i<n;i++)
System.out.println("response time for process p"+p[i]+"is"+apw1[i]+" ");*/
for( i=0;i<n;i++)
{
int k=p[i];
turn[i]=bt[k-1]+apw1[i];
System.out.println("turnaround time for process p"+p[i]+"is"+turn[i]+" ");
}
for( i=0;i<n;i++)
tu+=turn[i];
float avg1=tu/n;
System.out.println("average turn-around time is:"+avg1);
paint(g);
}
break;
case 6:
{
int total=0,k=0,co=0,small=999,sp=0,sp1=0,x=0,count=0;
int pro[][]=new int[n][4];
int wt[]=new int[n];
int wt1[]=new int[n];
int bt1[]=new int[n];
int tt[]=new int[n];
apw1=new int [20];
p=new int[20];
for(int i=0;i<n;i++)
{
pro[i][0]=i;
System.out.print("Burst Time for P"+i+" :");
pro[i][3]=Integer.parseInt(obj.readLine());
total+=pro[i][3];
System.out.print("Arrival Time for P"+i+" :");
pro[i][2]=Integer.parseInt(obj.readLine());
System.out.print("Priority for P"+i+" :");
pro[i][1]=Integer.parseInt(obj.readLine());
}
for(int i=0;i<n;i++)
wt1[i]=pro[i][2];
for(int i=0;i<n;i++)
bt1[i]=pro[i][3];
for(int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(pro[i][2]>pro[j][2])
{
int temp[]=pro[i];
pro[i]=pro[j];
pro[j]=temp;
}
for(int i=1;i<=total;i++)
{
small=999;
for(int j=co;j<n;j++)
if(k>=pro[j][2])
co++;
for(int j=0;j<co;j++)
{
if(small>pro[j][1]&&pro[j][3]!=0)
{
small=pro[j][1];
sp=pro[j][0];
sp1=j;
}
}
if(p[x]==sp)
{
apw1[x+1]++;
}
else
{
x++;
p[x]=sp;
apw1[x+1]=apw1[x];
apw1[x+1]++;
count++;
}
pro[sp1][3]-=1;
if(pro[sp1][3]==0)
tt[sp1]=i;
for(int j=0;j<n;j++)
{
if(pro[j][3]!=0&&j!=sp)
wt[j]+=1;
}
k++;
}
for(int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(pro[i][0]>pro[j][0])
{
int temp[]=pro[i];
pro[i]=pro[j];
pro[j]=temp;
int tem=wt[i],tem1=tt[i];
wt[i]=wt[j];
wt[j]=tem;
tt[i]=tt[j];
tt[j]=tem1;
}
System.out.println();
for(int m=0;m<=count;m++)
p[m]+=1;
double awt=0.0,att=0.0;
System.out.println();
for (int i = 0; i<n; i++)
{
System.out.println("waiting time for process p "+i+" "+(wt[i]-wt1[i]));
awt+=(wt[i]-wt1[i]);
att+=(wt[i]-wt1[i]+bt1[i]);
}
for (int i = 0; i<n; i++)
{
System.out.println("turnaround time for process p"+i+" "+(wt[i]-wt1[i]+bt1[i]));
}
System.out.println("Average waiting time : "+(awt/n));
System.out.println("Average turnaround time : "+(att/n));
n1=count+1;
paint(g);
}
}
} while(ch!=7);
}
catch (Exception e)
{}
}
public void paint(Graphics g)
{
for(int j=1;j<=n1;j++)
{
g.drawRect(50,50,(apw1[j]*20),30);
g.drawString("p"+p[j-1],(55+(apw1[j-1]*20)),70);
g.drawString(""+apw1[j-1],50+(apw1[j-1]*20),100);
}
g.drawString(""+apw1[n1],50+(apw1[n1]*20),100);
}
}