StringTokenizer类

java.util.StringTokenizer Class

StringTokenizer可以采用分隔符将字符串解析为一个个的词汇单元，一次可以返回字符串内被分割后的某一个词汇单元

public StringTokenizer(String str)

public StringTokenizer(String str, String delim)

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public String nextToken()

public boolean hasMoreTokens()

public int countTokens()

注意这是一个动态变化方法，不可以在while循环中调用，因为每调用一次tokens数就会-1；故应该将初始值赋给一个变量，然后再将这个新的变量运用到循环中

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StingTokenizer往往和8个基本数据类型的封装类联合使用，因为分割之后的某些词汇单元可能需要当作布尔型或者整型来使用

Integer.toString(10);String.valueOf(10);

Integer.parseInt("10");

public class Generator{
    public static SaleItem creatSaleItem(String str, String deli){
        StringTokenizer tokenizer = new StringTokenizer(str, deli);
            if(tokenizer.countTokens() == 3){
                String isbn = tokenizer.nextToken();
                int unitSold = integer.parseInt(tokenizer.nextToken());
                return new SaleItem(isbn, unitSold, revenue);
            }else{
                return null;
                    }
            }

    public static void main(String[] args){
        String data = "A001_5_2013.54";
        SaleItem saleItem = creatSaleItem(data, "_");
        System.out.println("isbn:" + saleItem.getIsbn());
        System.out.println("unitSold:" + saleItem.getUnitsSold());
        System.out.println("revenue:" + saleItem.getRevenue());
        System.out.println("avgPrice:" + saleItem.avg.Price());
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;

public class ConsoleTest {
    private static BufferedReader stdIn = 
            new BufferedReader(new InputStreamReader(System.in));
    
    private static PrintWriter stdOut = 
            new PrintWriter(System.out, true);
    
    private static PrintWriter stdErr = 
            new PrintWriter(System.err, true);
    
    public static void main(String[] args)throws IOException {
        
        stdErr.print("Enter three integers on one line:");
        stdErr.flush();
        
        StringTokenizer tokenizer = 
                new StringTokenizer(stdIn.readLine());
        if(tokenizer.countTokens()!=3) {
            stdErr.println("Invalid input");
        }else {
            int firstValue = Integer.parseInt(tokenizer.nextToken());
            int secondValue = Integer.parseInt(tokenizer.nextToken());
            int thirdValue = Integer.parseInt(tokenizer.nextToken());
            int sum = firstValue + secondValue + thirdValue;
            stdOut.println("sum:" + sum);
            stdOut.println("sum:" + firstValue + secondValue + thirdValue);
        }
    }

}