Stringfruit="apple";switch(fruit){case"apple":System.out.println("Apple is red.");break;case"banana":System.out.println("Banana is yellow.");break;default:System.out.println("Unknown fruit.");} 实现原理:通过调用hashCod
publicbooleanequals(Object anObject){if(this==anObject){returntrue;}if(anObjectinstanceofString){String anotherString=(String)anObject;int n=value.length;if(n==anotherString.value.length){char v1[]=value;char v2[]=anotherString.value;int i=0;while(n--!=0){if(v1[i]!=v2[i])returnfa...
AI代码解释 packagecom.test;importjava.sql.Connection;importjava.sql.SQLException;importjava.sql.Statement;publicclassTestDao{privateConnection conn;// ①一个非线程安全的变量publicvoidaddTopic()throws SQLException{Statement stat=conn.createStatement();// ②引用非线程安全变量// …}} 由于①处的conn是成员...
oracleCase 是否返回列名、表名的大写。取值如下: false(默认):不对返回的列名、表名进行转换。 true:返回的列名、表名直接全部转换成大写。 strict:返回的列名、表名在字母全部都是小写的情况下转换成大写。 resetNlsFormat 是否支持将date/timestamp/timestamptz类型默认按照标准格式去识别。取值如下: ...
The break statement is used to terminate the switch-case statement. If break is not used, all the cases after the matching case are also executed. For example, class Main { public static void main(String[] args) { int expression = 2; // switch statement to check size switch (expression...
A switch statement starts with an expression whose type is an int, short, char, or byte. Here is the syntax of a switch statement: switch (int-or-char-value) { case label_1: // statement sequence break; case label_2: // statement sequence break; . . . case label_N: // ...
- This is a modal window. No compatible source was found for this media. argsdaydayoutSystem.out.println("Tuesday");break;case3:System.out.println("Wednesday");break;case4:System.out.println("Thursday");break;case5:System.out.println("Friday");break;case6:System.out.println("Saturday");...
Switch case statement is used when we have number of options (or choices) and we may need to perform a different task for each choice. The syntax of Switch case statement looks like this – switch (variable or an integer expression) { case constant: //Ja
{ Connection connect = null; Statement statement = null; ResultSet resultSet = null; try { Class.forName("com.aliyun.polardb.Driver"); Properties props = new Properties(); props.put("user", user); props.put("password", password); String url = "jdbc:polardb://" + host + ":" + ...
String cat="CAT"; switch (animal) { case dog: //compiles result = "domestic animal"; case cat: //does not compile result = "feline" } 4.4.StringComparison If aswitchstatement used the equality operator to compare strings, we couldn’t compare aStringargumentcreated with thenewoperatorto ...