Integer.parseInt(str,radix) radix指定str的进制,然后转化为int型数据,省略radix默认十进制
Double.parseDouble(str,radix)radix指定str的进制,然后转化为double型数据,省略radix默认十进制
Long.parseLong(str,radix)radix指定str的进制,然后转化为Long型数据,省略radix默认十进制
package Content; import java.util.*; public class NumChange { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("十进制数据num转化为2,8,16进制字符串:"); Integer num = scanner.nextInt(); System.out.println("Number = "+num); System.out.println("二进制:"+num.toBinaryString(num)); System.out.println("八进制:"+num.toOctalString(num)); System.out.println("十六进制:"+num.toHexString(num)); System.out.println("\n"); System.out.println("将指定进制的字符串转化为十进制:"); String string = "10000"; System.out.println("String="+string); System.out.println("十进制:"+Integer.parseInt(string)); System.out.println("二进制:"+Integer.parseInt(string,2)); System.out.println("八进制:"+Integer.parseInt(string,8)); System.out.println("十六进制:"+Integer.parseInt(string,16)); } }