- 布尔类型判断
boolean bl=true;
if(bl) { //bl==true
System.out.println("真");
}
2.字符串内容比较.equals
String str1="小花",str2="小花";
System.out.println(str1==str2); //true
Scanner s=new Scanner(System.in);
String str3=s.next(); //String str3;
if("exit".equals(str3)) { //"exit".equals(str3)
System.out.println("退出");
}