根据Udemy的Java教程写的笔记，新手友好。
🔗：https://www.udemy.com/course/learn-java-programming-java-beginners-course/
基础语法
public class name {
public static void main(String[] args){
System.out.println("This is the 2nd instruction that i have executed");
System.out.print("my name is ");
}
}
缩写 psvm tab
缩写 sout tab
缩写 souf tab
operators
arithmetic operators
relational operators
logical operators
assignment operators
concatenation
public class concatenation {
public static void main(String[] args) {
int number =10;
String text = "test";
double doubleNumber = 11.1;
float floatNumber = 11.1F;
boolean truth = true;
char c = '*';
System.out.println("my string vatriable has the value "+text);
System.out.printf("I have decalred a string variable with the value %s",text);
System.out.println();
System.out.printf("I have decalred a int varibale with the value %d",number);
System.out.println();
System.out.printf("I have decalred a double varibale %f " +
"and a string with the value %s", doubleNumber,text);
System.out.println();
System.out.printf("We are decalring a boolean %b",truth);
}
}
char %c
int %d
double %f
equality of two strings
Java is a case sensitve language
.equalsIgnoreCase
