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1、在JAVA程序中由String和“+”参与的运算变量都会被转为字符类型，可以理解为先把32313133353236313431303231363533e4b893e5b19e31333335313237变量转为字符型然后在进行字符拼接。
public class Test {
public static void main(String[] args){
int intnum = 9;
long longnum = 10L;
short shortnum = 11;
byte bytenum = 12;
float floatnum = 13F;
double doublenum = 14;
char charstr = 56; //ASCII码对应8
String str = “Zhu Cheng feng is a good boy!”;
boolean booleanstr = true;
System.out.println(“intnum is “+intnum);
System.out.println(“longnum is “+longnum);
System.out.println(“shortnum is “+shortnum);
System.out.println(“bytenum is “+bytenum);
System.out.println(“floatnum is “+floatnum);
System.out.println(“doublenum is “+doublenum);
System.out.println(“charstr is “+charstr);
System.out.println(“str is “+str);
System.out.println(“booleanstr is “+booleanstr);
}
}
2、多个变量参与运算时JAVA程序每行的执行顺序是从左到右
public class Test {
public static void main(String[] args){
int intnum = 9;
long longnum = 10L;
System.out.println(intnum+longnum+” is the result!”);
}
}
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