public class Main {
public static void main(String[] args) {
boolean b1 = true;
boolean b2 = false; /** n o w j a v a . c o m 提 供 **/
int num = 365;
double d = -0.0;
char c = 'A';
String str1;
String str2 = null;
str1 = b1 + " friends"; // Assigns "true friends" to str1
System.out.println(str1);
str1 = b2 + " identity"; // Assigns "false identity" to str1 /** N o w J a v a . c o m - 时代Java 提供 **/
System.out.println(str1);
// Assigns "null and void" to str1. Because str2 is null, it is replaced
// by a string "null" by the concatenation operator
str1 = str2 + " and void";
System.out.println(str1);
str1 = num + " days"; // Assigns "365 days" to str1
System.out.println(str1);
str1 = d + " zero"; // Assigns "-0.0 zero" to str1
System.out.println(str1);
str1 = Double.NaN + " is absurd"; // Assigns "NaN is absurd" to str1
System.out.println(str1);
str1 = c + " is a letter"; // Assigns "A is a letter" to str1
System.out.println(str1);
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