Java的替换所有的字符串，替换所有数字低于3

public static enum pie { 
    APPLE_PIE1(1, 250), 
    PUMPKIN_PIE1(2, 300), 
    OTHER_PIE1(3, 350), 
    APPLE_PIE2(4, 400), 
    OTHER_PIE2(5, 450), 
    PUMPKIN_PIE2(6, 500), 
    APPLE_PIE3(7, 550), 
    ; 
    private static Map<Integer, pie> pie = new HashMap<Integer, pie>(); 
    static { 
     for(pie pie : pie.values()) { 
      pie.put(pie.getId(), pie); 
     } 
    } 

    public static pie forId(int id) { 
     return pie.get(id); 
    } 

    private pie(int id, double exp) { 
     this.id = id; 
     this.exp = exp; 
    } 

    public int id; 
    public double exp; 


    System.out.println("My favorite type of pie is " + pie.toString().toLowerCase().replaceAll("_", " ").replaceAll("2", "").replaceAll("3", "").replaceAll("4", "") + ".");

示例代码撕掉了，但我怎么会作出这样的“.replaceAll（‘号’，‘’）”取代小于或等于所有的数字4用更简单的代码？创建一个新的.replaceAll 3次是多余的。如果我这样做...：Java的替换所有的字符串，替换所有数字低于3

double number[] = {1, 2, 3, 4}; 

    pie.toString().toLowerCase().replaceAll("_", " ").replaceAll(number.toString(), "") + ".");

...我会得到一个讨厌的错误。

这里的错误...

SEVERE: An error occurred in an executor service! The server will be halted immediately. 
java.util.regex.PatternSyntaxException: Unclosed character class near index 9 
[[email protected] 
     ^
at java.util.regex.Pattern.error(Unknown Source) 
at java.util.regex.Pattern.clazz(Unknown Source) 
at java.util.regex.Pattern.sequence(Unknown Source) 
at java.util.regex.Pattern.expr(Unknown Source) 
at java.util.regex.Pattern.compile(Unknown Source) 
at java.util.regex.Pattern.<init>(Unknown Source) 
at java.util.regex.Pattern.compile(Unknown Source) 
at java.lang.String.replaceAll(Unknown Source)

来源

2013-01-03 Fridder

显示你希望我们的错误 - 自己运行程序？ – MrSmith42

你确定你使用正确的语法吗？最后一行似乎以一个随机的'）'结尾，我不认为它应该在那里。 – Patrickdev

要改正错误，你应该更换

double number[] = {1, 2, 3, 4};

通过

String number = "[1, 2, 3, 4]";

但我不会用的replaceAll这样做。相反，我会一个label字段添加到您的枚举，以类似的方式为其他领域，并呼吁getLabel()代替toString()，或覆盖toString()返回标签：

public static enum pie { 
    APPLE_PIE1(1, 250, "apple pie"), 
    PUMPKIN_PIE1(2, 300, "pumpkin pie"), 
    ... 

    private int id; 
    private double exp; 
    private String label; 

    private pie(int id, double exp, String label) { 
     this.id = id; 
     this.exp = exp; 
     this.label = label; 
    } 

    public String getLabel() { 
     return label; 
    } 

    // optional: I wouldn't do it as it would make debugging harder 
    @Override 
    public String toString() { 
     return label; 
    } 
}

来源

2013-01-03 23:09:17

非常感谢。 – Fridder

Java的替换所有的字符串，替换所有数字低于3

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