先来先服务算法（FCFS|先来先服务算法（FCFS java实现）
package Arithmetic;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.ByteBuffer;
import java.util.Scanner;
import java.util.concurrent.CountDownLatch;
public class Awara_OS_FCFS { public static int i;
public double awara[];
public double awara1[];
public int process_number;
public double arrival_time[];
public double services_time[];
public double start_time[];
public double wait_time[];
public double completion_time[];
public double turn_around_time[];
public double turn_around_time_with_weight[];
private void Set_process_number(int process_nuber) {
this.process_number = process_nuber;
} private double get_process_number() {
return process_number;
} private void Set_arrival_time(int arrival_time[]) {
for (i = 0;
i < process_number;
i++) {
this.arrival_time[i] = arrival_time[i];
}
} private double[] get__arrival_time() {for (i = 0;
i < process_number;
i++) {
awara[i] = arrival_time[i];
}
return awara;
} private void Set_services_time(int services_time[]) {
for (i = 0;
i < process_number;
i++) {
this.services_time[i] = services_time[i];
}
} private double[] get_services_time() {
for (i = 0;
i < process_number;
i++) {
awara1[i] = services_time[i];
}
return awara1;
} private void FCFS() {start_time[0] = arrival_time[0];
completion_time[0] = arrival_time[0] + services_time[0];
start_time[0] = arrival_time[0];
turn_around_time[0] = completion_time[0] - arrival_time[0];
turn_around_time_with_weight[0] = turn_around_time[0]
/ services_time[0];
for (i = 1;
i < process_number;
i++) {
start_time[i] = completion_time[i - 1];
wait_time[i] = start_time[i] - arrival_time[i];
completion_time[i] = arrival_time[i] + services_time[i]
+ wait_time[i];
turn_around_time[i] = completion_time[i] - arrival_time[i];
turn_around_time_with_weight[i] = turn_around_time[i]
/ services_time[i];
}
System.out.println("\n：开始时间是： ");
for (i = 0;
i < process_number;
i++) {
System.out.print(start_time[i] + "\t");
}
System.out.println("\n等待时间是：");
for (i = 0;
i < process_number;
i++) {
System.out.print(wait_time[i] + "\t");
}
System.out.println("\n完成时间是：");
for (i = 0;
i < process_number;
i++) {
System.out.print(completion_time[i] + "\t");
}
System.out.println("\n周转时间是：");
for (i = 0;
i < process_number;
i++) {
System.out.print(turn_around_time[i] + "\t");
}
System.out.println("\n带权周转时间：");
for (i = 0;
i < process_number;
i++) {
System.out.print(turn_around_time_with_weight[i] + "\t");
}
} public static void main(String[] args) throws Exception {
System.out.println("请输入进程数：");
Awara_OS_FCFS cok = new Awara_OS_FCFS();
BufferedReader buf = null;
buf = new BufferedReader(new InputStreamReader(System.in));
String str1 = null;
str1 = buf.readLine();
cok.process_number = (int) Double.parseDouble(str1);
cok.arrival_time = new double[cok.process_number];
cok.services_time = new double[cok.process_number];
cok.completion_time = new double[cok.process_number + 1];
cok.turn_around_time = new double[cok.process_number + 1];
cok.start_time = new double[cok.process_number];
cok.wait_time = new double[cok.process_number];
cok.turn_around_time_with_weight = new double[cok.process_number];
String str = null;
String str2 = null;
System.out.println("\n请输入各进程到达时间");
for (i = 0;
i < cok.process_number;
i++) {
str = buf.readLine();
cok.arrival_time[i] = Double.parseDouble(str);
}System.out.println("\n请输入各个进程服务时间");
for (i = 0;
i < cok.process_number;
i++) {
str2 = buf.readLine();
cok.services_time[i] = Double.parseDouble(str2);
}
System.out.println("该进程数为" + cok.process_number);
System.out.println("\n到达时间为");
for (i = 0;
i < cok.process_number;
i++) {
System.out.print(cok.arrival_time[i] + "\t");
}
System.out.println("\n服务时间为：");
for (i = 0;
i < cok.process_number;
i++) {
System.out.print(cok.services_time[i] + "\t");
}
cok.FCFS();
}}【先来先服务算法（FCFS|先来先服务算法（FCFS java实现）】
转载于:https://my.oschina.net/u/2538590/blog/539053
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