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Index › Programming Questions & Help › Syntax Questions › Array assignment

movax Full Member Offline Posts: 172 Colorado	Array assignment? Jun 2nd, 2006, 9:29pm   Quick example to illustrate question: float[] a= new float[width*height]; float[] b= new float[width*height]; // Fill a with values b=a;                // What does this do?   arraycopy(a,b);     // Compared to this. -----------------------------------------
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Ira Full Member Offline Posts: 238 Dallas	Re: Array assignment? Reply #1 - Jun 2nd, 2006, 10:49pm   Run this, it should help illustrate the difference: float[]a = {1,2,3}; float[]b = {4,5,6}; float[]c = {1,2,3}; float[]d = {4,5,6}; b=a; println(a); println(b); println(a==b); b[1]=10; println(a); println(); arraycopy(c,d); println(c); println(d); println(c==d); d[1]=10; println(c);
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movax Full Member Offline Posts: 172 Colorado	Re: Array assignment? Reply #2 - Jun 5th, 2006, 11:39pm   OK so using the = operator on arrays changes what they point to.  I didn't see anything about that in the docs, but I guess you can do pointer stuff that way.  Thanks.
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Ira Full Member Offline Posts: 238 Dallas	Re: Array assignment? Reply #3 - Jun 6th, 2006, 4:47am   yup. In java arrays, classes and interfaces are reference types.
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