3.java Getting Started fourth chapter

1.equals to determine if strings are equal

2.switch statement: (1) The parentheses after the switch must be integral or character type;

(2) The case must be followed by a constant, such as 1,2+2, ' a ', and a single quotation mark;

(3) The case of the same function can be merged:

(4) The default block can appear in any position, or can be omitted;

3.java Loop statement: While, Do...while, for

While: first judgment, after execution Do...while: first execution, after judgment

For loop variable initialization and cyclic variable change parts, you can initialize or change the values of multiple loop variables simultaneously with ', '

4.break: Directly jump out of the current loop, execute the statement after the loop statement;

5.continue: End the loop and jump into the next loop;

3.java Getting Started fourth chapter