Java运算符
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算术运算符:+.-.*./.%.++.--
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package operator;
public class Demo01 {
public static void main(String[] args) {
//二元运算符
//Ctrl+D: 复制当前行到下一行
int a =10;
int b =20;
int c =25;
int d =25;
System.out.println(a+b);
System.out.println(a-b);
System.out.println(a*b);
System.out.println(a/(double)b);//除完有小数 进行强制转换(double)
}
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package operator;
public class Demo02 {
public static void main(String[] args) {
long a =1231321323121L;
int b =123;
short c=10;
byte d =8;
System.out.println(a+b+c+d);//Long类型
System.out.println(b+c+d);//Int类型
System.out.println(c+d);//Int类型
}
} -
关系运算符:> < >= == (等于) !=(不等于)instancof
package operator;
public class Demo03 {
public static void main(String[] args) {
//关系运算符返回的结果:正确 错误 布尔值
//if
int a = 10;
int b =20;
int c =21;
//取余,模运算
System.out.println(c%a);//c/a 21/10=2...1
System.out.println(a>b);
System.out.println(a<b);
System.out.println(a==b);
System.out.println(a!=b);
}
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逻辑运算符:&&,||,!(与或非)
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位运算符:&,|,^,~,>>,<<,>>>(了解!!!)
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条件运算符?:
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