check.java

来自「this is lexical tokens of compiler opera」· Java 代码 · 共 77 行

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package compilerphase1;

/**
 *
 * @author sherif
 */
public class Check {
    String[] keywords={"for","while","do","until","int","float","double","long","bool","char","string","void","main","static","return","if","else"};
    String[] special={"(",")","[","]","{","}",";","'","\"",".",",","#"};
    String[] operator={"=","/","*","-","+",">","<",">=","<=","!=","==","++","--","+=","-=","*=","/=","%","&","&&","|","||","!"};
    char[] number={'0','1','2','3','4','5','6','7','8','9'};
//*******************************
    boolean iskeywords(String input){
       int flag=0;
       for(int k=0;k<keywords.length;k++)
        {
      if(input.equals(keywords[k])){
         flag=1;
       }
     }
      if(flag==0)
       return(false);
      else
       return(true);
    }
    //*******************************
    boolean isspecial(String input){
       int flag=0;
       for(int k=0;k<special.length;k++)
        {
      if(input.equals(special[k])){
        flag=1;
      }
     }
     if(flag==0)
          return false;
        else
          return true;
    }
    //*******************************
    boolean isoperator(String input){

       int flag=0;
       for(int k=0;k<operator.length;k++)
        {
      if(input.equals(operator[k])){
       flag=1;
      }
     }
     if(flag==0)
           return false;
        else
          return true;
    }
  //*************************************
  boolean isnum(String input){
      int flag=0;
      char c=input.charAt(0);
       for(int k=0;k<number.length;k++)
        {
      if(c==number[k]){
       flag=1;
      }
     }
     if(flag==0)
           return false;
        else
          return true;

    }
}