listing16-13_savingdatainstrings.txt

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// Listing 16-13. Saving Space by Storing Array Data in Strings


// Java source code instructions:
String value = "23,57,23453,2342,232,213,345,56,6767";
String[] valueChunks = TextUtil.split( value, ',' );
int[] values = new int[ valueChunks.length ];
for ( int i = 0; i < values.length; i++ ) {
values[ i ] = Integer.parseInt( valueChunks[ i ] );
}


// resulting Java bytecode instructions:
ldc1 #75 <String "23,57,23453,2342,232,213,345,56,6767">
astore 4
aload 4
bipush 44
invokestatic #81 <Method String[] TextUtil.split( String, char )>
astore 5
aload 5
arraylength
newarray int[]
astore 6
iconst_0
istore 7
goto 208
aload 6
iload 7
aload 5
iload 7
aaload
invokestatic #87 <Method int Integer.parseInt( String )>
iastore
iinc 7 1