关于字符串连接操作符（三）(源自IBM蓝色之路一道笔试题目)
再看下下面的例子
public class TestChar1 { public static void main(String[] args) { // int类型的常量可以赋值给任意类型的变量 byte b = (int) 1; //OK short s = (int) 1; //OK int i = (int) 1; //OK long l = (int) 1; //OK float f = (int) 1; //OK double d = (int) 1; //OK char c = (int) 1; //OK } } public class TestChar2 { public static void main(String[] args) { // int类型的变量只能赋值给高类型的变量，不能赋值给低类型的变量（会损失精度） int a = 1; char c = (int) a; // Type mismatch: cannot convert from int to char byte b = (int) a; // Type mismatch: cannot convert from int to char short s = (int) a; // Type mismatch: cannot convert from int to char int i = (int) a; //OK long l = (int) a; //OK float f = (int) a; //OK double d = (int) a;//OK } }public class TestChar3 { public static void main(String [] args) { int i = 1; // Type mismatch: cannot convert from int to char char c = i; System.out.println(c); } } public class TestChar4 { public static void main(String [] args) { char c = (int)1; //Ok, 等价于： char c='\001'; char d = '\001'; //OK System.out.println(c==d); //output: true } }