public class A {
public static final String S_CTANT_ABC = "ABC";
public boolean methodA(String sParam1){
if (A.S_CTANT_ABC.equalsIgnoreCase(sParam1)){
return true;
}
return false;
}
}
public class BadCode {
public static final int DEBUG_MODE = 1;
public static final int PRODUCTION_MODE = 2;
public static void calculationWithPrint(int logMode){
double someValue = 0D;
for (int i = 0; i ＜ 10000; i++) {
someValue = someValue + i;
myPrintMethod(logMode, someValue);
}
}
public static void myPrintMethod(int logMode, double value) {
if (logMode ＞ BadCode.DEBUG_MODE) { return; }
System.out.println(value);
}
public static void main(String [] n) {
BadCode.calculationWithPrint(BadCode.PRODUCTION_MODE);
}
}
另外，字符串连接也是浪费CPU时间的一个大头，请看下面的示例代码：
public static void concatenateStrings(String startingString) {
for (int i = 0; i ＜ 20; i++) {
startingString = startingString + startingString;
}
}
public static void concatenateStringsUsingStringBuffer(String startingString) {
StringBuffer sb = new StringBuffer();
sb.append(startingString);
for (int i = 0; i ＜ 20; i++) {
sb.append(sb.toString());
}
}