compare.java

来自「Java编写后缀表达式计算器, 用于输出生成后缀表达式, 程序包含完整的Docu」· Java 代码 · 共 49 行

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package comparerecursion;
import java.io.*;
import exception.ExceptionContainer;
/**
 *
 * @author zouhao
 */
public class Compare {
    public static void main(String[] args) throws IOException {
        long times,timee;
        int i = 0,j = 1000;
        System.out.println("Now test the program for compare the recursion version and the improve one!");
        System.out.println("The string for test is 1+2+3+4+5+6+7+8+9");
        while(i<5){
            int t;
            System.out.println("Do "+j+" test!");
            System.out.println("    Creat the recursion version!");
            times = System.currentTimeMillis();
            for(t=0;t<j;t++){
                Compare_Recursion parserr = new Compare_Recursion();
                parserr.expr();
                ExceptionContainer tempr = ExceptionContainer.getinstance();
                tempr.printexception(parserr.input);
                }
            timee = System.currentTimeMillis();
            System.out.println("    The time used:"+(timee-times));
            System.out.println("    Creat the improve version!");
            times = System.currentTimeMillis();
            for(t=0;t<j;t++){
                Compare_Improve parseri = new Compare_Improve();
                parseri.expr();
                ExceptionContainer tempi = ExceptionContainer.getinstance();
                tempi.printexception(parseri.input);
                }
            timee = System.currentTimeMillis();
            System.out.println("    The time used:"+(timee-times));
            i++;
            j *= 10;
        }
        System.out.println("End of compare.");
}

}