JSP实用教程(源代码)(普通下载).rar

public class testGrammar { public static void main(String args[]){ // float fTest = 12.34f; // char ch='a'; // boolean bTest = true; // boolean bTest1 = (ch>1 && ch<10); int a=100; int b=110; int c=13; //算术运算 System.out.println(b+c); //123 System.out.println(b-c); //97 System.out.println(b*c); //1430 System.out.println(b/c); //8 System.out.println(b%c); //6 //位逻辑运算 System.out.println(b&c); //12(00001100) System.out.println(b|c); //111(01101111) System.out.println(~b); //-111(10010001，因为高位为1，所以为负值) System.out.println(b^c); //99(01100011) //条件逻辑运算 System.out.println((b<100) && (b>200)); //False System.out.println((b<200) || (b>300)); //True System.out.println(!(b<200)); // False //自增自减运算 System.out.println(b++); //110（语句结束b=111） System.out.println(++b); //112（语句结束b=112） System.out.println(b--); //112（语句结束b=111） System.out.println(--b); //110（语句结束b=110） //移位运算 System.out.println(b<<2); //440 System.out.println(b>>2); //27 //关系运算 System.out.println(b>c); //true System.out.println(b!=c); //true //?:操作符 System.out.println(b>c?b:c); //b,110 //if语句 if(a>b) { System.out.println("a>b"); } else { System.out.println("a<b"); } //switch语句 int bookColor; bookColor= 3; switch (bookColor) { case 1: System.out.println("red"); break; case 2: System.out.println("yellow"); break; case 3: System.out.println("blue"); //break; case 4: System.out.println("black"); //break; default: System.out.println("没有这种颜色"); break; } //for循环 for(int i=0; i<3; i++) { System.out.println(i); } //while循环 int j = 0; while( j <3 ) { System.out.println(j); j = j + 1; } //do循环 int k = 10; do { System.out.println(k); } while( k<10); //break语句 int i=0; for(;;) { System.out.println(i); i++; if(i==3) break; } //continue语句 for(i=0;i<=100;i++) { if(i%2==0) continue; System.out.println(i); } //label示例 try{ loop_top: while (true) { loop_second: for (int l=0; l < 10; l++) { switch (c = System.in.read()) { case '\n': break loop_second; case '0': break loop_top; default: break; }//end switch } // end for System.out.println("继续读取字符！"); }// end while System.out.println("字符读取完毕！"); } catch (Exception e) { } } }