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53 lines (42 loc) · 1.27 KB
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package Demo;
public class HelloJava {
String url = "http://www.abc.com";
String webName = "ABC";
//System.out.println(url);
public void printString() {
float x = 223.56F;
float y = 100.00f;
double d1 = 23.45D;
double d2 = 422.22d;
double d3 = 2523.234;
System.out.println("x = " + x);
System.out.println("y = " + y);
System.out.println("d1 = " + d1);
System.out.println("d2 = " + d2);
System.out.println("d3 = " + d3);
// 字符型
char webName1 = '微';
char webName2 = '学';
char webName3 = '苑';
System.out.println("网站的名字是：" + webName1 + webName2 + webName3);
// 整型
short x1=22; // 十进制
int y1=022; // 八进制
long z1=0x22L; // 十六进制
System.out.println("转化成十进制：x1 = " + x1 + ", y1 = " + y1 + ", z1 = " + z1);
// 浮点型
float m = 22.45f;
double n = 10;
System.out.println("计算乘积：" + m + " * " + n + "=" + m*n);
// 布尔型
boolean a = 100>10;
boolean b = 100<10;
System.out.println("100>10 = " + a);
System.out.println("100<10 = " + b);
if(a){
System.out.println("100<10是对的");
}else{
System.out.println("100<10是错的");
}
}
}