0x001 算数运算符
int num1 = 1, num2 = 2;
System.out.println(num1 + num2);
// 3 System.out.println(num1 - num2);
// -1 System.out.println(num1 / num2);
// 0 System.out.println(num1 * num2);
// 2 System.out.println(num1 % num2);
//1
0x002 自增自减
System.out.println(num1++);
// 1 System.out.println(num1);
// 2 System.out.println(num1--);
// 2 System.out.println(num1);
// 1 System.out.println(++num1);
// 2 System.out.println(--num1);
// 1
0x003 关系操作符
System.out.println((num1 < num2));
// true System.out.println((num1 > num2));
// false System.out.println(num1 == num2);
// false System.out.println(num1 != num2);
// true
0x004 逻辑操作符
boolean boolean1 = false;
boolean boolean2 = true;
System.out.println(boolean1 && boolean2);
// false System.out.println(boolean1 || boolean2);
// true System.out.println(!boolean1);
// true
0x005 直接操作符
int i1 = 0x2f;
int i2 = 0x2F;
int i3 = 0177;
char c1 = 0xffff;
byte b1 = 0x7f;
short s1 = 0x7f;
long l1 = 100L;
long l2 = 100l;
float f1 = 1;
float f2 = 1f;
float f3 = 1F;
double d1 = 1d;
double d2 = 1D;
System.out.println(i1);
// 47 System.out.println(i2);
//47 System.out.println(i3);
// 127 System.out.println(c1);
// System.out.println(b1);
// 127 System.out.println(s1);
// 127 System.out.println(l1);
// 100 System.out.println(l2);
// 100 System.out.println(f1);
// 1.0 System.out.println(f2);
// 1.0 System.out.println(f3);
// 1.0 System.out.println(d1);
// 1.0 System.out.println(d2);
// 1.0
0x006 三元运算符
int a = 0;
boolean isSuccess = false;
a = isSuccess ? 1 : 2;
System.out.println(a);
// 2
0x007 字符串+、+=
String str = "";
str = str + "1";
str += "2";
System.out.println(str);
0x008 类型转化
int i = 100;
long long1 = (long) i;
System.out.println(long1);
// 100 long1 = i;
System.out.println(long1);
// 100 long long2 = (long) 200;
System.out.println(long2);
// 200 i = (int) long1;
System.out.println(i);
// 200 float float1=0.1f;
float float2=0.9f;
System.out.println((int) float1);
// 转化int会被舍去 System.out.println((int) float2);
// 转化int会被舍去
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