怎样删除字符串中的"\\"以及"\\"后的内容,该如何解决

    private static void test(){        String test = "123\\456";        String str = test.substring(0, test.indexOf("\\"));        System.out.println(str);    }
------解决方案--------------------
String tes = "asdd//sdfsd//sdf";
String res = (tes.split("//"))[0];
------解决方案--------------------
import java.util.regex.*;

public class Hello {
	public static void main(String[] args) {
		String str = "I am a boy, \\and I love beauty!\\haha";
//运用正则表达式
		Pattern p = Pattern.compile("\\\\.*");
		Matcher m = p.matcher(str);
		System.out.println(m.replaceAll(""));
	}
}
------解决方案--------------------
import java.util.regex.*;

public class Hello {
	public static void main(String[] args) {
		String str = "I am a boy, \\and I love beauty!\\haha";
		System.out.println(str.replaceAll("\\\\.*", "")); //正则表达式
	}
}
------解决方案--------------------
HTML code
        String str="asdd//sdfsd//sdf ";         str=str.replaceAll("//.*","");        System.out.println(str);