22 lines
678 B
Java
22 lines
678 B
Java
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import java.util.*;
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public class SymbolTable {
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Map <String, Integer> OffsetMap = new HashMap <String,Integer>();
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public void insert( String s, int address ) {
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if( !OffsetMap.containsValue(address) )
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OffsetMap.put(s,address);
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else
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throw new IllegalArgumentException("Reference to a memory location already occupied by another variable");
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}
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public int lookupAddress ( String s ) {
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if( OffsetMap.containsKey(s) )
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return OffsetMap.get(s);
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else
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return -1;
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// throw new IllegalArgumentException("Unknown variable");
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}
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}
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