小狮子Java运算符、循环、条件、Switch学习
运算符练习：
public class Test {
public static void main(String
[] args
) {
int a
= 30;
int b
= 35;
int c
= 40;
int d
= 45;
System
.out
.println("a + b = " + (a
+ b
) );
System
.out
.println("a - b = " + (a
- b
) );
System
.out
.println("a * b = " + (a
* b
) );
System
.out
.println("b / a = " + (b
/ a
) );
System
.out
.println("b % a = " + (b
% a
) );
System
.out
.println("c % a = " + (c
% a
) );
System
.out
.println("a++ = " + (a
++) );
System
.out
.println("a-- = " + (a
--) );
System
.out
.println("d++ = " + (d
++) );
System
.out
.println("++d = " + (++d
) );
}
}
循环结构
while 循环
public class Test {
public static void main(String args
[]) {
int x
= 10;
while( x
< 20 ) {
System
.out
.print("我爱你 : " + x
);
x
++;
System
.out
.print("\n");
}
}
}
do…while 循环
public class Test {
public static void main(String args
[]){
int x
= 10;
do{
System
.out
.print("我爱你 : " + x
);
x
++;
System
.out
.print("\n");
}while( x
< 20 );
}
}
for循环
public class Test {
public static void main(String args
[]) {
for(int x
= 10; x
< 20; x
= x
+1) {
System
.out
.print("我爱你 : " + x
);
System
.out
.print("\n");
}
}
}
条件语句if else 和switch case
if else语句
public class Test {
public static void main(String args
[]){
int x
= 10;
if( x
< 20 ){
System
.out
.print("我找到女朋友了");
}
}
}
switch case 语句
public class Test {
public static void main(String args
[]){
char grade
= 'C';
switch(grade
)
{
case 'A' :
System
.out
.println("优秀");
break;
case 'B' :
case 'C' :
System
.out
.println("良好");
break;
case 'D' :
System
.out
.println("及格");
break;
case 'F' :
System
.out
.println("你需要再努力努力");
break;
default :
System
.out
.println("你他妈输入的是成绩");
}
System
.out
.println("你的等级是 " + grade
);
}
}
这就是这两天的学习，这两天学校的项目有点多也总开会。想好好打一天代码。但是总有很多事情干扰。
晚安，伙伴们。
这就是这两天的学习，这两天学校的项目有点多也总开会。想好好打一天代码。但是总有很多事情干扰。
晚安，伙伴们。
