意图 临时变量可以帮助你将表达式分解为比较容易管理的形式 在较长的算法中,可以运用临时变量来解释每一步运算的意义
示例
/**
* 引入解释性变量之前
* Created by luo on 2017/4/23.
*/
public class IntroduceExplainingVariableBefore {
private String platform;
private String browser;
private int resize = 0;
public void test(){
if ((platform.toUpperCase().indexOf("MAC") > -1) && (browser.toUpperCase().indexOf("IE") > -1) && wasInitialized() && resize > 0){
//do something
}
}
private boolean wasInitialized() {
return false;
}
}
/**
* 引入解释性变量之后
* Created by luo on 2017/4/23.
*/
public class IntroduceExplainingVariableAfter {
private String platform;
private String browser;
private int resize = 0;
public void test() {
final boolean isMacOs = platform.toUpperCase().indexOf("MAC") > -1;
final boolean isIEBrowser = browser.toUpperCase().indexOf("IE") > -1;
final boolean wasResized = resize > 0;
if (isMacOs && isIEBrowser && wasInitialized() && wasResized) {
//do something
}
}
private boolean wasInitialized() {
return false;
}
}