我有以下代码
"unchecked"哪个有效，但会发出警告，说明我正在进行@SupressWarnings操作。
我想在不执行ParameterExpression<String>[] searchStrings = new ParameterExpression<String>[10];
的情况下摆脱警告，但如果我这样做
@SupressWarnings我收到错误
无法创建ParameterExpression的通用数组
有没有使用var ctx = document.getElementById("myChart").getContext("2d");
//Adding functionality to add vertical line
// Create gradient
grd = ctx.createLinearGradient(0, 400.000, 0, 100.000);
// Add colors
grd.addColorStop(0.000, 'rgba(0, 255, 0, 1.000)');
grd.addColorStop(0.200, 'rgba(191, 255, 0, 1.000)');
grd.addColorStop(0.400, 'rgba(221, 255, 0, 1.000)');
grd.addColorStop(0.600, 'rgba(255, 229, 0, 1.000)');
grd.addColorStop(0.800, 'rgba(255, 144, 0, 1.000)');
grd.addColorStop(1.000, 'rgba(255, 50, 0, 1.000)');
var data = {
labels: ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20"],
datasets: [
{
lineTension: 0,
backgroundColor: 'rgba(0, 0, 0, 0)',
borderCapStyle: 'butt',
borderColor: "red",
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
borderWidth: 4,
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointRadius: 0,
pointBorderWidth: 0,
pointHoverRadius: 0,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 0,
pointHitRadius: 0,
data: [ {x: 0, y: 1300}, {x: 12, y: 1300}],
showLines: false,
},
{
lineTension: 0,
backgroundColor: 'rgba(0, 0, 0, 0)',
borderCapStyle: 'butt',
borderColor: "#42bff4",
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
borderWidth: 4,
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointRadius: 0,
pointBorderWidth: 0,
pointHoverRadius: 0,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 0,
pointHitRadius: 0,
data: [ {x: 13, y: 0}, {x: 13, y: 1100}],
showLines: false,
},
{
lineTension: 0,
backgroundColor: grd,
borderCapStyle: 'butt',
borderColor: "rgba(0, 0, 0, 0)",
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointRadius: 0,
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointHitRadius: 10,
data: [{x: 0, y: 0}, {x: 1, y: 100}, {x: 2, y: 250}, {x: 3, y: 400}, {x: 4, y: 400}, {x: 5, y: 400}, {x: 6, y: 500}, {x: 7, y: 700}, {x: 8, y: 900},
{x: 9, y: 1000}, {x: 10, y: 1000}, {x: 11, y: 1300}, {x: 12, y: 1300}, {x: 13, y: 1100},],
spanGaps: false,
},
{
lineTension: 0,
backgroundColor: '#ededed',
borderCapStyle: 'butt',
borderColor: "rgba(0, 0, 0, 0)",
borderDash: [],
borderDashOffset: 0.0,
borderJoinStyle: 'miter',
pointBorderColor: "rgba(75,192,192,1)",
pointBackgroundColor: "#fff",
pointRadius: 0,
pointBorderWidth: 1,
pointHoverRadius: 5,
pointHoverBackgroundColor: "rgba(75,192,192,1)",
pointHoverBorderColor: "rgba(220,220,220,1)",
pointHoverBorderWidth: 2,
pointHitRadius: 10,
data: [{x: 0, y: 0}, {x: 1, y: 100}, {x: 2, y: 250}, {x: 3, y: 400}, {x: 4, y: 400}, {x: 5, y: 400}, {x: 6, y: 500}, {x: 7, y: 700}, {x: 8, y: 900},
{x: 9, y: 1000}, {x: 10, y: 1000}, {x: 11, y: 1300}, {x: 12, y: 1300}, {x: 13, y: 1100}, {x: 14, y: 900}, {x: 15, y: 700}, {x: 16, y: 500}, {x: 17, y: 300},
{x: 18, y: 100}, {x: 19, y: 50}, {x: 20, y: 0}],
spanGaps: false,
},
]
};
var myChart = new Chart(ctx, {
type: 'scatter',
data: data,
options: {
elements: {
point: {
radius: 0,
}
},
maintainAspectRatio: false,
legend: {
display: false
},
scales: {
yAxes: [{
display: false,
ticks: {
beginAtZero:true,
callback: function(value, index, values) {
return value + '°';
},
mirror: true,
},
gridLines: {
display: false,
drawBorder: false,
},
}],
xAxes: [{
type: 'linear',
position: 'bottom',
display: true,
gridLines: {
display: false,
zeroLineColor:"black",
color: "black"
},
ticks: {
display: false
}
}]
},
// annotation: {
// drawTime: 'afterDatasetsDraw',
// events: ['click'],
// dblClickSpeed: 350,
// annotations: [{
// drawTime: 'afterDraw', // overrides annotation.drawTime if set
// id: 'a-line-1', // optional
// type: 'line',
// mode: 'horizontal',
// scaleID: 'y-axis-0',
// value: '1300',
// borderColor: 'red',
// borderWidth: 2,
//
// // Fires when the user clicks this annotation on the chart
// // (be sure to enable the event in the events array below).
// onClick: function(e) {
// // `this` is bound to the annotation element
// }
// }]
// },
},
});
删除警告？
答案 0 :(得分：0)
对于数组，您不能使用泛型类进行初始化，但可以执行列表
List<ParameterExpression<String>> searchStrings = new ArrayList<>();