string自己测试

String b = new String("my string"); 
String a="my string";
String c="my string"; 
String d = new String("my string"); 
String e = b; System.out.print(a==c);//true 
System.out.print(b==d);//false 
System.out.print(a==b);//false 
System.out.print(e==b);//true

char[] chrCharArray; //创建一个字符数组
chrCharArray chrCharArray = a.toCharArray(); //将字符串变量转换为字符数组 
for(char s:chrCharArray){     
　　System.out.println(s); 
} 
String k= String.valueOf(chrCharArray ); //将字符数组转换为字符串 
System.out.print(k);