Name: ssT124754 Date: 02/21/2001


* don't reject the problem right away even if it 1.3 please *
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)


Is it a bug, a lack of discipline or maybe something else? I don't know but the
exceptions thrown by the various implementation of valueOf(String) among core
java classes are not consistent (they don't react the same way when a null is
passed to the method for example).

I think it would be nice to see some overall consistency among the
implementation of valueOf(String) among those basic classes (even though it is
probably to late for Sun to fix it and we'll have to live with those like a few
other decifiencies like that). Well, let us know.

Source code:

public class ValueOf {

  public static void main(String[] argv) {

    try {
      Boolean.valueOf(null);
    } catch (Exception e) {
      System.out.println("Boolean.valueOf(null)=" + e.toString());
    }

    try {
      Boolean.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Boolean.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Byte.valueOf(null);
    } catch (Exception e) {
      System.out.println("Byte.valueOf(null)=" + e.toString());
    }

    try {
      Byte.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Byte.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Short.valueOf(null);
    } catch (Exception e) {
      System.out.println("Short.valueOf(null)=" + e.toString());
    }

    try {
      Short.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Short.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Integer.valueOf(null);
    } catch (Exception e) {
      System.out.println("Integer.valueOf(null)=" + e.toString());
    }

    try {
      Integer.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Integer.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Long.valueOf(null);
    } catch (Exception e) {
      System.out.println("Long.valueOf(null)=" + e.toString());
    }

    try {
      Long.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Long.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Float.valueOf(null);
    } catch (Exception e) {
      System.out.println("Float.valueOf(null)=" + e.toString());
    }

    try {
      Float.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Float.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      Double.valueOf(null);
    } catch (Exception e) {
      System.out.println("Double.valueOf(null)=" + e.toString());
    }

    try {
      Double.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("Double.valueOf(\"xyz\")=" + e.toString());
    }

    try {
      java.sql.Date.valueOf(null);
    } catch (Exception e) {
      System.out.println("java.sql.Date.valueOf(null)=" + e.toString());
    }

    try {
      java.sql.Date.valueOf("xyz");
    } catch (Exception e) {
      System.out.println("java.sql.Date.valueOf(\"xyz\")=" + e.toString());
    }

  }

}

Output: *note that Boolean.valueOf(null) is not throwing an exception*
Byte.valueOf(null)=java.lang.NumberFormatException: null
Byte.valueOf("xyz")=java.lang.NumberFormatException: xyz
Short.valueOf(null)=java.lang.NumberFormatException: null
Short.valueOf("xyz")=java.lang.NumberFormatException: xyz
Integer.valueOf(null)=java.lang.NumberFormatException: null
Integer.valueOf("xyz")=java.lang.NumberFormatException: xyz
Long.valueOf(null)=java.lang.NumberFormatException: null
Long.valueOf("xyz")=java.lang.NumberFormatException: xyz
Float.valueOf(null)=java.lang.NullPointerException
Float.valueOf("xyz")=java.lang.NumberFormatException: xyz
Double.valueOf(null)=java.lang.NullPointerException
Double.valueOf("xyz")=java.lang.NumberFormatException: xyz
java.sql.Date.valueOf(null)=java.lang.IllegalArgumentException
java.sql.Date.valueOf("xyz")=java.lang.IllegalArgumentException
(Review ID: 117428)
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