import java.util.Arrays;

class OuterClass{
    public int data1 = 10;
    private int data2 = 20;
    public static int data3 = 30;
    //实例内部类
     class InnerClass{
        public int data4 = 40;
        public int data1 = 50;
        private int data5 = 50;
        public void testInner(){
            System.out.println("testInner");
            System.out.println(OuterClass.this.data1);
            System.out.println(data2);
            System.out.println(data3);
            System.out.println(data4);
            System.out.println(data5);
        }
    }
    static class InnerClass2{
        public int data4 = 40;
        private int data5 = 50;
        public void testInner(){
            System.out.println("testInner()");
        }
    }


}
public class Test {


    public static void main5(String[] args) {
        String str = "hello world hello bit";
        String[] ret = str.split(" ",2);//分割
        for (int i = 0; i < ret.length; i++) {
            System.out.println(ret[i]);
        }
    }
    public static void main4(String[] args) {
        String str1 = "abcdeabfsahdsfdv";
        String ret = str1.replaceFirst("ab","00");
        System.out.println(ret);
        String ret1 = str1.replaceAll("ab","00");//取代转换
        System.out.println(ret1);
        String ret3 = str1.replace("b","0");
        System.out.println(ret3);
    }
    public static void main3(String[] args) {
        String s1 = String.valueOf(1234);
        String str3 = "helloworld";
        char[] array = str3.toCharArray();//将字符串变为数组
        System.out.println(Arrays.toString(array));
        System.out.println(s1);
    }
    public static void main2(String[] args) {
        String str1 = "hello";
        String str2 = new String("hello");
        char[] ch = {'a','b','c','d'};
        String str3 = new String(ch);
        System.out.println(str1);
        System.out.println(str2);
        System.out.println(str3);
        System.out.println(str1.length());
        System.out.println(str3.length());
        System.out.println(str1.isEmpty());
        System.out.println(str1 == str2);//比较的是地址
        System.out.println(str1.equals(str2));
        System.out.println(str1.charAt(1));
        System.out.println(str1.indexOf('e'));
    }
    public static void main1(String[] args) {
        OuterClass outerClass = new OuterClass();
        OuterClass.InnerClass innerClass = outerClass.new InnerClass();//实列化内部类
        innerClass.testInner();
        OuterClass.InnerClass innerClass1 = new OuterClass().new InnerClass();
        innerClass1.testInner();
        OuterClass.InnerClass2 innerClass2 = new OuterClass.InnerClass2();//静态内部类
        innerClass2.testInner();
    }
}