<span style="font-size:18px;">//Main.java
public class Main {
public static void main(String []args){
Example ex = new Example();
ex.test();
}
}
class Example{
void test(){
System.out.println("Call Example");
}
}</span>
<span style="font-size:18px;">//Main.java
public class Main {
public static void main(String []args){
System.out.println("A" + "B");
System.out.println('A' + 'B');
System.out.println('A');
System.out.println('B');
}
}
/*
Output:
AB
131
A
B
*/</span>
使用單引號且存在'+'操作符時,字符'A'和'B'被轉換成int型。//Main.java
public class Main{
public static void main(String []args){
String str = 3 + 9 + "test" + 4 + 5;
System.out.println(str);
}
}
//Output:12test45
5、final關鍵字
//Main.java
import java.lang.*;
public class Main{
public static void main(String []args) throws Exception{
int number = 10_000_000;
System.out.println(number);
float fnumber = 1.00_234f;
System.out.println(fnumber);
}
}
/*
Output:
10000000
1.00234
*/