1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 2 3<html> 4 5<head> 6<title>new-instance</title> 7<link rel=stylesheet href="opcode.css"> 8</head> 9 10<body> 11 12<h1>new-instance</h1> 13 14<h2>Purpose</h2> 15 16<p> 17Construct a new instance of the indicated type, storing a reference to it in the 18destination. The type must refer to a non-array class. 19</p> 20 21<h2>Details</h2> 22 23<table class="instruc"> 24<thead> 25<tr> 26 <th>Op & Format</th> 27 <th>Mnemonic / Syntax</th> 28 <th>Arguments</th> 29</tr> 30</thead> 31<tbody> 32<tr> 33 <td>22 21c</td> 34 <td>new-instance vAA, type@BBBB</td> 35 <td><code>A:</code> destination register (8 bits)<br/> 36 <code>B:</code> type index</td> 37</tr> 38</tbody> 39</table> 40 41<h2>Constraints</h2> 42 43<ul> 44 <li> 45 A must be a valid register index for the current stack frame. 46 </li> 47 <li> 48 B must be a valid index into the type pool. 49 </li> 50 <li> 51 Type constant pool entry B must contain a valid type descriptor for a 52 non-array class. 53 </li> 54</ul> 55 56<h2>Behavior</h2> 57 58<ul> 59 <li> 60 An attempt is made to get a reference to the class C the name of which is 61 contained in type pool entry B. 62 </li> 63 <li> 64 If C has not been loaded and resolved before, it is being loaded and 65 resolved. All exceptions that are possible during class loading can occur at 66 this point. 67 </li> 68 <li> 69 An attempt is made to create a new instance I of C. All exceptions that are 70 possible during instantiation can occur at this point. 71 </li> 72 <li> 73 A reference to the new instance is stored in register vA, that is vA' = I. 74 </li> 75 <li> 76 If v(A-1) is the lower part of a register pair, v(A-1)' becomes undefined. 77 </li> 78 <li> 79 If v(A+1) is the upper part of a register pair, v(A+1)' becomes undefined. 80 </li> 81</ul> 82 83<h2>Exceptions</h2> 84 85<ul> 86 <li> 87 All exceptions that are possible during class loading can occur. 88 </li> 89 <li> 90 All exceptions that are possible during instantiation can occur. 91 </li> 92</ul> 93 94</body> 95</html> 96