print("hello world!");

print(Directory.current);

print(Directory.systemTemp);

// var ex= new File('file.txt').readAsStringSync();

// print(ex);

String a ="第三方似懂非懂司法所";

print(a.split("似懂"));

print(a);

print(a.substring(0,3));

print(a.codeUnitAt(0));

print(String.fromCharCode(31532));

print(a[0]);

print(a.indexOf('pattern'));

print(a.indexOf('第'));

print(a.contains('other'));

print(a.length);

print(a.lastIndexOf('所'));