public class DataType {
public static void main(String[] args) {
//基本数据类型 1整数型 2 小数型(浮点)3 char (字符)
//Boolean 布尔(真假)
/*
* 整数型
* byte short int long
*/
//变量的声明 数据类型 变量名(标识符);
byte number1;
number1=8;// =赋值号 把右边的值赋给左边
System.out.println("number1:"+number1);// +拼接号
byte number2=9; // 变量的初始化
System.out.println("number2:"+number2);
/*
* byte 范围 -128—127 -2^7—2^7-1
* short 短整型-2^15—2^15-1
*
*/
short number3=220;
short number4=560;
System.out.println("number3:"+number3);
System.out.println("number4:"+number4);
//int -2^31--2^31-1
int number5=999999999;
int number6=666666666;
System.out.println("number5:"+number5);
System.out.println("number6:"+number6);
//long 长整型 -2^63—2^63-1
long lnumber1 = 9999999999l;
long lnumber2 = 8888888888l;
System.out.println("lnumber1"+lnumber1);
System.out.println("lnumber1"+lnumber2);
// float double 小数型
double weight=70.55;
double height=175.6;
System.out.println("小明的身高为"+height);
System.out.println("小明的体重为"+weight);
float fnumber1=25.5f;
float fnumber2=24.6f;
//char 字符
char Achar='男';
char Achar2='b';
System.out.println("Achar:"+Achar);
System.out.println("Achar2:"+Achar2);
//boolean 布尔型 表示真假
boolean istrue=true;
boolean istrue2=false;
System.out.println("istrue:"+istrue);
System.out.println("istrue2:"+istrue2);
}
}
Java 8个数据类型
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转载自blog.csdn.net/ilovehua521/article/details/81878482
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