变量声明及使用
示例: public class MyVariable{
public static void main(String [ ] args ){
int money=1000;
System.out.println(money);
}
}
语法:
数据类型 变量名; double score; //声明双精度浮点型变量score储存分数
String name; //声明字符串型变量name储存学生姓名
char sex; //声明字符型变量sex储存性别
变量名 = 值; score = 98.5; //储存98.5
name ="张三"; //储存"张三"
sex='男'; //储存'男'
运算符 示例1: public class OperatorDemo{
public static void main(String [] args){
int aScore=80;
int bScore;
aScore=bScore;
Sytem.out.println("张萌的成绩是:"+bScore);
}
}
示例2: public class AutoTypeChange{
public static void main(String[]args){
double firstAvg=81.29;
double secondAvg;
int rise=2;
secondAvg=firstAvg+rise;
System.out.println("第二次平均分是:"+secondAvg);
}
}
示例3: import java.util.*;
public class BoolTest{
public static void main(String[]args){
int liSi=80;
boolean isBig;
Scanner input=new Scanner(System.in);
System.out.print("输入学员张三的成绩");
int zhangSan=input.nextInt();
isBig=zhangSan>liSi;
System.out.println("张三成绩比李四高么?"+isBig);
}
}