Type Signatures (Magic xpa 3.x)
The Java Native Interface uses the Java Virtual Machine’s definition of type signatures, as shown in the table below.
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Z
|
boolean
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B
|
byte
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C
|
char
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S
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short
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I
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int
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J
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long
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F
|
float
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D
|
double
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L
|
fully qualified class
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[type
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type[ ]
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(arg-types) ret-type
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method type
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For example, the Java method, long f (int n, String s, int[ ] arr) has the type signature, (ILjava/lang/String;[I)J
where:
• int n - I
• String s - Ljava/lang/String;
• int[ ] arr - [ I
• long f - J
The command line utility, javap -s <class name>, analyzes a class and lists the signatures of its methods and variables.
