5流程控制

Java流程控制

用户交互scanner

    Scanner scanner = new Scanner(System.in);
    if (scanner.hashNext()) {
        String str = scanner.next();
        String str = scanner.nextLine();
    }
    scanner.close();

顺序结构

选择结构

• if
• switch

switch(expression) {
    case value :
        break;
    case value :        
        break;
    default :
}

循环结构

• while
• for

增强for

    int[] nums = {1,2,3,4,5};

    for (int x : nums) {
        System.out.println(x);
    }

break、continue