StringBuffer s=new StringBuffer(); long start = System.currentTimeMillis(); for (int i=0;i<10000;i++){ s1+="a"; } long stop = System.currentTimeMillis(); System.out.println(stop-start);
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程序片断二:
StringBuffer s=new StringBuffer(10000);// long start=System.currentTimeMillis(); for (int i=0;i<10000;i++){ s.append("a"); } long stop=System.currentTimeMillis(); System.out.println(stop-start);