break

How to break this while(true) loop?

不羁岁月 提交于 2020-02-25 05:02:43
问题 Hi I am trying to break from this loop and return the coordinates when both if statements are true. However the loop is never ending. How can I fix it? public static String[] positionQuery(int dim, Scanner test_in) { Scanner scanner = new Scanner(System.in); System.out.println("Provide origin and destination coordinates."); System.out.println("Enter two positions between A1-H8:"); while(true) { String line = scanner.nextLine(); String[] coordinates = line.split(" "); if(coordinates.length ==

Excel导入

╄→гoц情女王★ 提交于 2020-02-23 13:33:34
/** * Excel解析成 员工数据集合 * @param file * @param allNations * @param allPoliticsstatus * @param allDepartment * @param allPositions * @param allJobLevels * @return */public static List<Employee> excel2Employee(MultipartFile file, List<Nation> allNations, List<Politicsstatus> allPoliticsstatus, List<Department> allDepartment, List<Position> allPositions, List<JobLevel> allJobLevels) { List<Employee> list = new ArrayList<>(); Employee employee = null; try { //1. 创建一个 workbook 对象 HSSFWorkbook workbook = new HSSFWorkbook(file.getInputStream()); //2. 获取 workbook 中表单的数量 int numberOfSheets = workbook

关于break 与 continue关键字

偶尔善良 提交于 2020-02-08 17:37:47
break 与 continue关键字 今天将自己对于break 和 continue关键字的理解进行分享 break关键字的作用是结束循环。 class Demo { public static void main ( String [ ] args ) { int i = 0 ; while ( i < 10 ) { System . out . println ( i ) ; if ( 5 == i ) { System . out . println ( "测试break" ) ; break ; } i += 1 ; } } } 我们可以看出break在6次循环后就跳出了循环并且停止了运行。 continue关键字是提前结束本次循环,直接继续执行下次循环。 class Demo1 { public static void main ( String [ ] args ) { int i = 0 ; while ( i < 10 ) { System . out . println ( i ) ; if ( 5 == i ) { System . out . println ( "测试 continue" ) ; continue ; } i += 1 ; } } } 此次我们可以看出变成了死循环 。 分析原因 ,我们可以看出对continue关键字的解释

java:break与continue的区别

别来无恙 提交于 2020-02-04 22:15:32
java:break与continue的区别 break是结束当前循环,continue是结束本次循环,不结束当前循环。 public class Fighting { public static void main ( String [ ] args ) { for ( int i = 1 ; i <= 9 ; i ++ ) { if ( i % 3 == 0 ) { break ; } System . out . print ( i + "\t" ) ; } } } public class Fighting { public static void main ( String [ ] args ) { for ( int i = 1 ; i <= 9 ; i ++ ) { if ( i % 3 == 0 ) { continue ; } System . out . print ( i + "\t" ) ; } } } 来源: CSDN 作者: bear xiao 链接: https://blog.csdn.net/weixin_44750594/article/details/104174753

Is a break statement required or is the return statement enough?

随声附和 提交于 2020-02-03 10:32:32
问题 In my Python 3(.5) script I have a simple for loop, that looks like this: request = "simple string" ignore = ( # Tuple that contains regex's to ignore ) for (i, regex) in enumerate(ignore): if re.search(regex, request): print("Found regex {0}.".format(i)) return False Now, this works as expected and the loop stops on the first match that is found. I understand that the break statement is what is used to break loops in Python. Knowing this lead to the question: Must I use the break statement

switch语句用法

情到浓时终转凉″ 提交于 2020-01-28 08:52:51
switch(表达式) {   case 常量表达式1:语句1; break;   ....   case 常量表达式n:语句n; break;   default:语句;break; } 1.default就是如果没有符合的case就执行它,default并不是必须的. 2.case后的语句可以不用大括号. 3.switch语句的判断条件可以接受int,byte,char,short,枚举,不能接受其他类型. 4.在都没有break 语句的情况下: 首先会在所有的case 语句中,寻找满足条件的语句。如果找到,会从该语句顺序向下执行每个语句;若找不到,会从第一段开始,向下顺序执行每一段语句。 在有break 语句的情况下: · 找到一个满足条件的case 语句执行,若找不到,会执行default 的语句。 原理归原理,下面是几个容易混淆的例子. 1.标准型(case后面都有break语句) int i=3; switch(i) { case 1: System.out.println(1); break; case 2: System.out.println(2); break; case 3: System.out.println(3); break; default: System.out.println("default"); break; } 输出结果: 3 2.特殊型1

Break is not activated inside a for loop in Python [closed]

烂漫一生 提交于 2020-01-26 04:00:07
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 months ago . I want to print the first 10 key-value pairs from the dictionary word_index and I wrote this code: for key, value in enumerate(word_index): count = 0 if count <10: print(f'key {key} : value: {value}') count = count + 1 else: break As you can see the break is not activated. Why is that? What I should change in

How can I get break on runtime exception(or error) in javascript (or ecmascript?)

倾然丶 夕夏残阳落幕 提交于 2020-01-24 14:46:20
问题 How can I break on error? I have a code: throw new Error("Some error"); And I'm using most recent version of Web Inspector (Webkit) and Firebug(Mozilla). These tools catch and print the error, but does not break. May I don't know the how to. Please let me know how can I to do these? 回答1: In WebKit you need to click this to enable break on error. If you click it again it will also break on warnings and clicking it again will disable it. alt text http://a.yfrog.com/img832/3580

How can I get break on runtime exception(or error) in javascript (or ecmascript?)

感情迁移 提交于 2020-01-24 14:46:09
问题 How can I break on error? I have a code: throw new Error("Some error"); And I'm using most recent version of Web Inspector (Webkit) and Firebug(Mozilla). These tools catch and print the error, but does not break. May I don't know the how to. Please let me know how can I to do these? 回答1: In WebKit you need to click this to enable break on error. If you click it again it will also break on warnings and clicking it again will disable it. alt text http://a.yfrog.com/img832/3580

How can I get break on runtime exception(or error) in javascript (or ecmascript?)

假装没事ソ 提交于 2020-01-24 14:45:06
问题 How can I break on error? I have a code: throw new Error("Some error"); And I'm using most recent version of Web Inspector (Webkit) and Firebug(Mozilla). These tools catch and print the error, but does not break. May I don't know the how to. Please let me know how can I to do these? 回答1: In WebKit you need to click this to enable break on error. If you click it again it will also break on warnings and clicking it again will disable it. alt text http://a.yfrog.com/img832/3580