whats wrong with this?

用Scanner键盘输入，然后接一个数组进去貌似是最简洁的 Scanner scan = new Scanner(System.in); int [] a= new int [4]; int max = a[0]; for(int i = 0;i<a.length;i++){ if(max<=a[i]) max = a[i]; } System.out.println(max);

public class Solution { public static void main(String[] args) throws Exception { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in)); int a = Integer.parseInt(bufferedReader.readLine()); int b = Integer.parseInt(bufferedReader.readLine()); int c = Integer.parseInt(bufferedReader.readLine()); int d = Integer.parseInt(bufferedReader.readLine()); int max1 = a < b ? b : a; int max2 = c < d ? d : c; int max3 = max1 < max2 ? max2 : max1; System.out.println(max3); } }

分享下

import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {
        //在此编写你的代码
        BufferedReader reader =new BufferedReader(new InputStreamReader(System.in));
        int a = Integer.parseInt(reader.readLine());
        int b = Integer.parseInt(reader.readLine());
        int c = Integer.parseInt(reader.readLine());
        int d = Integer.parseInt(reader.readLine());

        if(a >= b && a >= c && a >= d){
            System.out.println(a);
        }else if(b >= c && b >= d && b >= a){
            System.out.println(b);
        }else if(c >= d && c >= d && c >= a){
            System.out.println(c);
        }else if(d >= c && b >= b && b >= a){
            System.out.println(d);
        }
    }
}

借用楼下的灵感，用数组存储很方便 by arrayList

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        double num1 = Double.parseDouble(br.readLine());
        double num2 = Double.parseDouble(br.readLine());
        double num3 = Double.parseDouble(br.readLine());
        double num4 = Double.parseDouble(br.readLine());

        double[] arr = {num1,num2,num3,num4};
        double max = arr[0];
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] > max){
                max = arr[i];
            }
        }
        System.out.println(max);

好像想复杂了2333 import java.io.*; import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { //在此编写你的代码 Scanner scan = new Scanner(System.in); int[] num = new int[4]; for(int i=0;i<4;i++){ num[i]=scan.nextInt(); } int temp=0; int count=num.length; for(int i=0;i<count-1;i++){ for(int j=0;j<count-1-i;j++){ if(num[j]>num[j+1]){ temp=num[j+1]; num[j+1]=num[j]; num[j]=temp; } } } System.out.println(num[3]); } }

鄙人学识浅薄，4个数只能这样凑合 BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in)); int a = Integer.parseInt(buffer.readLine()); int b = Integer.parseInt(buffer.readLine()); int c = Integer.parseInt(buffer.readLine()); int d = Integer.parseInt(buffer.readLine()); System.out.println((a>b?a:b)>(c>d?c:d)?(a>b?a:b):(c>d?c:d));

package zh.codegym.task.task04.task0419; /* 四个数字中的最大值 */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String x = reader.readLine(); String y = reader.readLine(); String z = reader.readLine(); String m = reader.readLine(); int a = Integer.parseInt(x); int b = Integer.parseInt(y); int c = Integer.parseInt(z); int d = Integer.parseInt(m); if(a>=b && a>=c && a>=d) System.out.println(a); else if(b>=c && b>=d) System.out.println(b); else if(c>=d) System.out.println(c); else System.out.println(d); } }

好像就我自己写的最复杂 伤心了。。。。 public static void main(String[] args) throws Exception { BufferedReader sc =new BufferedReader(new InputStreamReader(System.in)); String a1 =sc.readLine(); String b1 =sc.readLine(); String c1 =sc.readLine(); String d1 =sc.readLine(); int a =Integer.parseInt(a1); int b =Integer.parseInt(b1); int c =Integer.parseInt(c1); int d =Integer.parseInt(d1); if(a>b|a==b){ if(c>d){ if(a>c){ System.out.println(a); }else if(a==c){ System.out.println(a|c); }else{ System.out.println(c); } }else if(c==d){ if(a>c){ System.out.println(a); }else if (a==c){ System.out.println(a|c|d); }else{ System.out.println(c|d); } }else { if(a>d){ System.out.println(a); }else if(a==d){ System.out.println(a|d); }else{ System.out.println(d); } } }else{ if(c>d){ if(b>c){ System.out.println(b); }else if(b==c){ System.out.println(b|c); }else{ System.out.println(c); } }else if(c==d){ if(b>c){ System.out.println(b); }else{ System.out.println(c|d); } }else{ if(b>d){ System.out.println(b); }else if (b==d){ System.out.println(b|d); }else{ System.out.println(d); } }

import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //在此编写你的代码 BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String a = reader.readLine(); String b = reader.readLine(); String c = reader.readLine(); String d = reader.readLine(); int q = Integer.parseInt(a); int w = Integer.parseInt(b); int e = Integer.parseInt(c); int r = Integer.parseInt(d); int []array = new int[]{q,w,e,r}; int max = array[0]; for(int x = 1;x < array.length; x ++){ if(array[x] > max){ max = array[x]; } } System.out.println(max); } }

package zh.codegym.task.task04.task0419; /* 四个数字中的最大值 */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //在此编写你的代码 BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in)); String num = buffer.readLine(); String num1 = buffer.readLine(); String num2 = buffer.readLine(); String num3 = buffer.readLine(); int a = Integer.parseInt(num); int b = Integer.parseInt(num1); int c = Integer.parseInt(num2); int d = Integer.parseInt(num3); int x = bijiao(a,b); int y = bijiao(x,c); int z = bijiao(y,d); System.out.println(z); } public static int bijiao(int a , int b){ int m =a; if(a<=b) {m=b;} return m; } }