0x001 算數運算符
java" id="highlighter_398820">
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int num1 = 1, num2 = 2;system.out.println(num1 + num2); // 3system.out.println(num1 - num2); // -1system.out.println(num1 / num2); // 0 system.out.println(num1 * num2); // 2system.out.println(num1 % num2); //1 |
0x002 自增自減
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system.out.println(num1++); // 1system.out.println(num1); // 2system.out.println(num1--); // 2system.out.println(num1); // 1system.out.println(++num1); // 2system.out.println(--num1); // 1 |
0x003 關系操作符
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system.out.println((num1 < num2)); // truesystem.out.println((num1 > num2)); // falsesystem.out.println(num1 == num2); // falsesystem.out.println(num1 != num2); // true |
0x004 邏輯操作符
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boolean boolean1 = false; boolean boolean2 = true; system.out.println(boolean1 && boolean2); // falsesystem.out.println(boolean1 || boolean2); // truesystem.out.println(!boolean1); // true |
0x005 直接操作符
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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); // 47system.out.println(i2); //47system.out.println(i3); // 127system.out.println(c1); // system.out.println(b1); // 127system.out.println(s1); // 127system.out.println(l1); // 100system.out.println(l2); // 100system.out.println(f1); // 1.0system.out.println(f2); // 1.0system.out.println(f3); // 1.0system.out.println(d1); // 1.0system.out.println(d2); // 1.0 |
0x006 三元運算符
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int a = 0;boolean issuccess = false;a = issuccess ? 1 : 2;system.out.println(a);// 2 |
0x007 字符串+、+=
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string str = "";str = str + "1";str += "2";system.out.println(str); |
0x008 類型轉化
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int i = 100;long long1 = (long) i;system.out.println(long1);// 100long1 = i;system.out.println(long1);// 100long long2 = (long) 200;system.out.println(long2);// 200i = (int) long1;system.out.println(i); // 200float float1=0.1f; float float2=0.9f;system.out.println((int) float1);// 轉化int會被舍去system.out.println((int) float2);// 轉化int會被舍去 |
