<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <title>new-instance</title> <link rel=stylesheet href="opcode.css"> </head> <body> <h1>new-instance</h1> <h2>Purpose</h2> <p> Construct a new instance of the indicated type, storing a reference to it in the destination. The type must refer to a non-array class. </p> <h2>Details</h2> <table class="instruc"> <thead> <tr> <th>Op & Format</th> <th>Mnemonic / Syntax</th> <th>Arguments</th> </tr> </thead> <tbody> <tr> <td>22 21c</td> <td>new-instance vAA, type@BBBB</td> <td><code>A:</code> destination register (8 bits)<br/> <code>B:</code> type index</td> </tr> </tbody> </table> <h2>Constraints</h2> <ul> <li> A must be a valid register index for the current stack frame. </li> <li> B must be a valid index into the type pool. </li> <li> Type constant pool entry B must contain a valid type descriptor for a non-array class. </li> </ul> <h2>Behavior</h2> <ul> <li> An attempt is made to get a reference to the class C the name of which is contained in type pool entry B. </li> <li> If C has not been loaded and resolved before, it is being loaded and resolved. All exceptions that are possible during class loading can occur at this point. </li> <li> An attempt is made to create a new instance I of C. All exceptions that are possible during instantiation can occur at this point. </li> <li> A reference to the new instance is stored in register vA, that is vA' = I. </li> <li> If v(A-1) is the lower part of a register pair, v(A-1)' becomes undefined. </li> <li> If v(A+1) is the upper part of a register pair, v(A+1)' becomes undefined. </li> </ul> <h2>Exceptions</h2> <ul> <li> All exceptions that are possible during class loading can occur. </li> <li> All exceptions that are possible during instantiation can occur. </li> </ul> </body> </html>