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java Programming Glossary: valueofHow is values() implemented for Java 6 enums? http://stackoverflow.com/questions/1163076/how-is-values-implemented-for-java-6-enums possible to view the source of the other enum methods e.g. valueOf String . Does values create a new array each time it is invoked.. Stuff values return Stuff VALUES.clone public static Stuff valueOf String name return Stuff Enum.valueOf Stuff.class name private.. public static Stuff valueOf String name return Stuff Enum.valueOf Stuff.class name private Stuff synthetic String enum name synthetic..
Why does 128==128 return false but 127==127 return true in this code? http://stackoverflow.com/questions/1700081/why-does-128-128-return-false-but-127-127-return-true-in-this-code a Integer capital I the compile emits Integer b2 Integer.valueOf 127 This line of code is also generated when you use autoboxing... line of code is also generated when you use autoboxing. valueOf is implemented such that certain numbers are pooled and it returns.. the java 1.6 source code line 621 public static Integer valueOf int i if i 128 i IntegerCache.high return IntegerCache.cache..
Ways to save enums in database http://stackoverflow.com/questions/229856/ways-to-save-enums-in-database save enums into a database is. I know there are name and valueOf methods to make it into a String back. But are there any other.. theSuit.name and then read back with Suit theSuit Suit.valueOf reader Suit The problem was in the past staring at Enterprise..
When to use primitive and when reference types in Java http://stackoverflow.com/questions/2509025/when-to-use-primitive-and-when-reference-types-in-java and unique instances of objects are not necessary use the valueOf method provided by the wrapper method as it performs caching.. the number of objects which are created Integer i1 Integer.valueOf 1 Prefer this. Integer i2 new Integer 1 Avoid if not necessary... 1 Avoid if not necessary. For more information on the valueOf methods the API specification for the Integer.valueOf method..
http://stackoverflow.com/questions/2974561/new-integer-vs-valueof Integer vs valueOf I was using Sonar to make my code cleaner and it pointed out.. out that I'm using new Integer 1 instead of Integer.valueOf 1 . Because it seems that valueOf does not instantiate a new.. 1 instead of Integer.valueOf 1 . Because it seems that valueOf does not instantiate a new object so is more memory friendly...
Why does String.valueOf(null) throw a NullPointerException? http://stackoverflow.com/questions/3131865/why-does-string-valueofnull-throw-a-nullpointerexception does String.valueOf null throw a NullPointerException according to the documentation.. according to the documentation the method String.valueOf Object obj returns if the argument is null then a string equal.. But how come when I try do this System.out.println String.valueOf null String.valueOf null it throws NPE instead try it yourself..
Switch Statement with Strings in Java http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java approximate a String based switch. This uses the static valueOf method generated by the compiler on every enum type. For example.. the compiler on every enum type. For example Pill p Pill.valueOf str switch p case RED pop break case BLUE push break share..
http://stackoverflow.com/questions/3847162/java-generics-super-keyword Object List Serializable Note that you can add Integer.valueOf 0 to any of the above types. however you CAN'T add new Object..
Difference between parseInt and valueOf in java? http://stackoverflow.com/questions/508665/difference-between-parseint-and-valueof-in-java between parseInt and valueOf in java What's the difference between these two methods They.. parseDouble parseLong etc how are they different from Long.valueOf string Edit Also which of these is preferable and used more.. share improve this question Well the API for Integer.valueOf String does indeed say that the String is interpreted exactly..
Very Large Numbers in Java Without using java.math.BigInteger http://stackoverflow.com/questions/5318068/very-large-numbers-in-java-without-using-java-math-biginteger Let's see if this works DecimalBigInt d2 DecimalBigInt.valueOf 12345678901234567890 System.out.println d2 Output Big 12 345678901.. This works for a round trip i.e. feeding it to the valueOf method gives an equivalent object but the leading zeros are.. int to our DecimalBigInt type. public static DecimalBigInt valueOf String text int radix DecimalBigInt bigRadix new DecimalBigInt..
Integer wrapper class and == operator - where is behavior specified? http://stackoverflow.com/questions/5581913/integer-wrapper-class-and-operator-where-is-behavior-specified improve this question Because of this code in Integer.valueOf int public static Integer valueOf int i if i 128 i IntegerCache.high.. of this code in Integer.valueOf int public static Integer valueOf int i if i 128 i IntegerCache.high return IntegerCache.cache.. integer1 127 is a shortcut for Integer integer1 Integer.valueOf 127 and for values between 128 and 127 inclusive the Integers..
http://stackoverflow.com/questions/604424/java-convert-string-to-enum this java enums share improve this question Yes Blah.valueOf A will give you Blah.A . The static methods valueOf and values.. Blah.valueOf A will give you Blah.A . The static methods valueOf and values are created at compile time and do not appear in..
Why isn't calling a static method by way of an instance an error for the Java compiler? http://stackoverflow.com/questions/610458/why-isnt-calling-a-static-method-by-way-of-an-instance-an-error-for-the-java-co another String hello hello String number123AsString hello.valueOf 123 Which makes it look as if each String instance comes with.. it look as if each String instance comes with a String valueOf int i method. java static methods share improve this question..
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