1    package futils; 
2     
3    import java.io.IOException; 
4     
5    public class Exec { 
6        Runtime rt = Runtime.getRuntime(); 
7     
8        public static void main(String args[]) { 
9            Exec e = 
10                   new Exec(); 
11           e.printRam(); 
12       } 
13    
14       public void setMethodTrace(boolean t) { 
15           rt.traceMethodCalls(t); 
16       } 
17    
18       public void setInstructionTrace(boolean t) { 
19           rt.traceInstructions(t); 
20       } 
21    
22       public void run(String s) { 
23           try { 
24               rt.exec(s); 
25           } catch (IOException e) { 
26               System.err.println("Exec error:" + e); 
27           } 
28       } 
29    
30       public String getPrintRamString() { 
31           return "free " + getFreeRam() 
32                   + " bytes out of " 
33                   + getTotalRam() + " bytes\n" + 
34                   getFreeRatioPercent() + " percent free"; 
35       } 
36    
37       public void printRam() { 
38           System.out.println(getPrintRamString()); 
39       } 
40    
41       public long getFreeRam() { 
42           return rt.freeMemory(); 
43       } 
44    
45       public long getTotalRam() { 
46           return rt.totalMemory(); 
47       } 
48    
49       public int getFreeRatioPercent() { 
50           return (int) (100 * getFreeRam() / (float) getTotalRam()); 
51       } 
52   } 
53