Java制作成绩统计图表_数据整理与控制台可视化输出

int[] scores = {85, 92, 78, 63, 90, 88, 74, 100, 55, 42, 70, 80};
int[] bins = new int[11]; // 每个元素代表一个分数段的计数
<p>for (int score : scores) {
if (score >= 0 && score <= 100) {
bins[score / 10]++;
}
}</p>

0-9  : 
10-19: 
20-29: 
30-39: 
40-49: *
50-59: **
60-69: *
70-79: ***
80-89: ***
90-99: **
100  : *

String[] labels = {"0-9", "10-19", "20-29", "30-39", "40-49",
                   "50-59", "60-69", "70-79", "80-89", "90-99", "100"};
<p>for (int i = 0; i < bins.length; i++) {
System.out.print(labels[i] + ": ");
for (int j = 0; j < bins[i]; j++) {
System.out.print("*");
}
System.out.println();
}</p>

for (int i = 0; i < bins.length; i++) {
    System.out.print(String.format("%-5s: ", labels[i]));
    for (int j = 0; j < bins[i]; j++) {
        System.out.print("*");
    }
    System.out.println(" (" + bins[i] + ")");
}

0-9  : (0)
10-19: (0)
...
80-89: *** (3)