In Java, if statement is used for testing the conditions. The condition matches the statement it returns true else it returns false. There are four types of If statement they are: 在Java中,if语句用于测试条件。 条件与返回true的语句匹配,否则返回false。 有四种类型的If语句: For example, if we...
Java If-else Theif-else statementin Java is the most basic of all theflow control statements. Anif-elsestatement tells the program to execute a certain block only if a particular test evaluates totrue, else execute the alternate block if the condition isfalse....
由于编译器在执行ifelse语句时,IfStatementExecutor先会被执行,当它执行时需要知道当前代码是ifelse还是仅仅包含if语句,如果inIfElseStatement设置成true,那表明当前代码是ifelse形式,如果是false表明当前代码是if形式,两种形式不同,输出的字节码就不同。
我们编译间套里面的if else时,把内部的ifelse对应的分支名称在前面加上i,比如一层间套,那么它对应的就是ibranch0,两层就是iibranch0,同理一层间套对应iout_branch0,两层就是iiout_branch0. 由于存在间套原因,ifelse语句编译比较困难,且容易出错。我们看看实现编译的代码实现,首先是修改program_generator.java:...
我们看看实现编译的代码实现,首先是修改program_generator.java: 代码语言:javascript 复制 publicclassProgramGeneratorextendsCodeGenerator{...privateint branch_count=0;privateint branch_out=0;privateString embedded="";publicintgetIfElseEmbedCount(){returnembedded.length();}publicvoidincraseIfElseEmbed(){embedd...
} else if ("other".equals(strategy)) { // Perform other operations } 上面一段代码,每一个if分支完成的都是相同的操作,只是在不同的性别场景下,操作方法的实现不同,那么就可以使用策略模式进行优化: 首先,定义一个抽象策略接口: public interface Strategy { ...
} else if (testscore >= 60) { grade = 'D'; } else { grade = 'F'; } System.out.println("Grade = " + grade); } } The output from the program is: Grade = C You may have noticed that the value oftestscorecan satisfy more than one expression in the compound statement:76 >= ...
String output=(s.contains("inviul"))?"Yes":"No"; } Switch Statement in Java It is used to tests multiple conditions, which act like an If-Else-If ladder. Switch statement is used with byte, short, int, enum, long, String and their corresponding wrapper classes. Thus, it tests the...
Optional 是 Java8 开始提供的新特性，使用这个语法特性，也可以减少代码中 if else 的数量，例如：...
The next condition, in the else if statement, is also false, so we move on to the else condition since condition1 and condition2 is both false - and print to the screen "Good evening".However, if the time was 14, our program would print "Good day."Exercise? The else if statement ...